1、原生JavaScript实现字符串长度截取

function cutstr(str, len) {

var temp;

var icount = 0;

var patrn = /[^\x00-\xff]/;

var strre = "";

for (var i = 0; i < str.length; i++) {

if (icount < len - 1) {

temp = str.substr(i, 1);

if (patrn.exec(temp) == null) {

icount = icount + 1

} else {

icount = icount + 2

}

strre += temp

} else {

break

}

}

return strre + "..."

}

2、原生JavaScript获取域名主机

function getHost(url) {

var host = "null";

if(typeof url == "undefined"|| null == url) {

url = window.location.href;

}

var regex = /^\w+\:\/\/([^\/]*).*/;

var match = url.match(regex);

if(typeof match != "undefined" && null != match) {

host = match[1];

}

return host;

}

3、原生JavaScript清除空格

String.prototype.trim = function() {

var reExtraSpace = /^\s*(.*?)\s+$/;

return this.replace(reExtraSpace, "$1")

}

4、原生JavaScript替换全部

String.prototype.replaceAll = function(s1, s2) {

return this.replace(new RegExp(s1, "gm"), s2)

}

5、原生JavaScript转义html标签

function HtmlEncode(text) {

return text.replace(/&/g, '&').replace(/\"/g, '"').replace(//g, '>')

}

6、原生JavaScript还原html标签

function HtmlDecode(text) {

return text.replace(/&/g, '&').replace(/"/g, '\"').replace(//g, '>')

}

7、原生JavaScript时间日期格式转换

Date.prototype.Format = function(formatStr) {

var str = formatStr;

var Week = ['日', '一', '二', '三', '四', '五', '六'];

str = str.replace(/yyyy|YYYY/, this.getFullYear());

str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));

str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));

str = str.replace(/M/g, (this.getMonth() + 1));

str = str.replace(/w|W/g, Week[this.getDay()]);

str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());

str = str.replace(/d|D/g, this.getDate());

str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());

str = str.replace(/h|H/g, this.getHours());

str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());

str = str.replace(/m/g, this.getMinutes());

str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());

str = str.replace(/s|S/g, this.getSeconds());

return str

}

8、原生JavaScript判断是否为数字类型

function isDigit(value) {

var patrn = /^[0-9]*$/;

if (patrn.exec(value) == null || value == "") {

return false

} else {

return true

}

}

9、原生JavaScript设置cookie值

function setCookie(name, value, Hours) {

var d = new Date();

var offset = 8;

var utc = d.getTime() + (d.getTimezoneOffset() * 60000);

var nd = utc + (3600000 * offset);

var exp = new Date(nd);

exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);

document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"

}

10、原生JavaScript获取cookie值

function getCookie(name) {

var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));

if (arr != null) return unescape(arr[2]);

return null

}

11、原生JavaScript加入收藏夹

function AddFavorite(sURL, sTitle) {

try {

window.external.addFavorite(sURL, sTitle)

} catch(e) {

try {

window.sidebar.addPanel(sTitle, sURL, "")

} catch(e) {

alert("加入收藏失败，请使用Ctrl+D进行添加")

}

}

}

12、原生JavaScript设为首页

function setHomepage() {

if (document.all) {

document.body.style.behavior = 'url(#default#homepage)';

document.body.setHomePage('http://www.jq-school.com')

} else if (window.sidebar) {

if (window.netscape) {

try {

netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")

} catch(e) {

alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true")

}

}

var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);

prefs.setCharPref('browser.startup.homepage', 'http://www.jq-school.com')

}

}

13、原生JavaScript判断IE6

var ua = navigator.userAgent.toLowerCase();

var isIE6 = ua.indexOf("msie 6") > -1;

if (isIE6) {

try {

document.execCommand("BackgroundImageCache", false, true)

} catch(e) {}

}

14、原生JavaScript加载样式文件

function LoadStyle(url) {

try {

document.createStyleSheet(url)

} catch(e) {

var cssLink = document.createElement('link');

cssLink.rel = 'stylesheet';

cssLink.type = 'text/css';

cssLink.href = url;

var head = document.getElementsByTagName('head')[0];

head.appendChild(cssLink)

}

}

15、原生JavaScript返回脚本内容

function evalscript(s) {

if(s.indexOf('

var arr = [];

while(arr = p.exec(s)) {

var p1 = /

var arr1 = [];

arr1 = p1.exec(arr[0]);

if(arr1) {

appendscript(arr1[1], '', arr1[2], arr1[3]);

} else {

p1 = /

arr1 = p1.exec(arr[0]);

appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);

}

}

return s;

}

16、原生JavaScript清除脚本内容

function stripscript(s) {

return s.replace(/.*?<\/script>/ig, '');

}

17、原生JavaScript动态加载脚本文件

function appendscript(src, text, reload, charset) {

var id = hash(src + text);

if(!reload && in_array(id, evalscripts)) return;

if(reload && $(id)) {

$(id).parentNode.removeChild($(id));

}

evalscripts.push(id);

var scriptNode = document.createElement("script");

scriptNode.type = "text/javascript";

scriptNode.id = id;

scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);

try {

if(src) {

scriptNode.src = src;

scriptNode. = false;

scriptNode.onload = function () {

scriptNode. = true;

JSLOADED[src] = 1;

};

scriptNode.onreadystatechange = function () {

if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode. {

scriptNode. = true;

JSLOADED[src] = 1;

}

};

} else if(text){

scriptNode.text = text;

}

document.getElementsByTagName('head')[0].appendChild(scriptNode);

} catch(e) {}

}

18、原生JavaScript返回按ID检索的元素对象

function $(id) {

return !id ? null : document.getElementById(id);

}

19、原生JavaScript返回浏览器版本内容

function browserVersion(types) {

var other = 1;

for(i in types) {

var v = types ? types : i;

if(USERAGENT.indexOf(v) != -1) {

var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig');

var matches = re.exec(USERAGENT);

var ver = matches != null ? matches[2] : 0;

other = ver !== 0 && v != 'mozilla' ? 0 : other;

}else {

var ver = 0;

}

eval('BROWSER.' + i + '= ver');

}

BROWSER.other = other;

}

20、原生JavaScript元素显示的通用方法

function $(id) {

return !id ? null : document.getElementById(id);

}

function display(id) {

var obj = $(id);

if(obj.style.visibility) {

obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible';

} else {

obj.style.display = obj.style.display == '' ? 'none' : '';

}

}

21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现

function insertAfter(newChild,refChild){

var parElem=refChild.parentNode;

if(parElem.lastChild==refChild){

refChild.appendChild(newChild);

}else{

parElem.insertBefore(newChild,refChild.nextSibling);

}

}

22、原生JavaScript中兼容浏览器绑定元素事件

function addEventSamp(obj,evt,fn){

if (obj.addEventListener) {

obj.addEventListener(evt, fn, false);

}else if(obj.attachEvent){

obj.attachEvent('on'+evt,fn);

}

}

23、原生JavaScript光标停在文字的后面，文本框获得焦点时调用

function focusLast(){

var e = event.srcElement;

var r =e.createTextRange();

r.moveStart('character',e.value.length);

r.collapse(true);

r.select();

}

24、原生JavaScript检验URL链接是否有效

function getUrlState(URL){

var xmlhttp = new ActiveXObject("microsoft.xmlhttp");

xmlhttp.Open("GET",URL, false);

try{

xmlhttp.Send();

}catch(e){

}finally{

var result = xmlhttp.responseText;

if(result){

if(xmlhttp.Status==200){

return(true);

}else{

return(false);

}

}else{

return(false);

}

}

}

25、原生JavaScript格式化CSS样式代码

function formatCss(s){//格式化代码

s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");

s = s.replace(/;\s*;/g, ";"); //清除连续分号

s = s.replace(/\,[\s\.\#\d]*{/g, "{");

s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");

s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");

s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");

return s;

}

26、原生JavaScript压缩CSS样式代码

function yasuoCss (s) {//压缩代码

s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释

s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");

s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理

s = s.replace(/;\s*;/g, ";"); //清除连续分号

s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白

return (s == null) ? "" : s[1];

}

27、原生JavaScript获取当前路径

var currentPageUrl = "";

if (typeof this.href === "undefined") {

currentPageUrl = document.location.toString().toLowerCase();

}

else {

currentPageUrl = this.href.toString().toLowerCase();

}

28、原生JavaScriptIP转成整型

function _ip2int(ip){

var num = 0;

ip = ip.split(".");

num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]);

num = num >>> 0;

return num;

}

29、原生JavaScript整型解析为IP地址

function _int2iP(num){

var str;

var tt = new Array();

tt[0] = (num >>> 24) >>> 0;

tt[1] = ((num << 8) >>> 24) >>> 0;

tt[2] = (num << 16) >>> 24;

tt[3] = (num << 24) >>> 24;

str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]);

return str;

}

30、原生JavaScript实现checkbox全选与全不选

function checkAll() {

var selectall = document.getElementById("selectall");

var allbox = document.getElementsByName("allbox");

if (selectall.checked) {

for (var i = 0; i < allbox.length; i++) {

allbox.checked = true;

}

} else {

for (var i = 0; i < allbox.length; i++) {

allbox.checked = false;

}

}

}

31、原生] JavaScript判断是否移动设备

function isMobile(){

if (typeof this._isMobile === 'boolean'){

return this._isMobile;

}

var screenWidth = this.getScreenWidth();

var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;

var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");

if(!fixViewPortsExperiment){

if(!this.isAppleMobileDevice()){

screenWidth = screenWidth/window.devicePixelRatio;

}

}

var isMobileScreenSize = screenWidth < 600;

var isMobileUserAgent = false;

this._isMobile = isMobileScreenSize && this.isTouchScreen();

return this._isMobile;

}

32、原生JavaScript判断是否移动设备访问

function isAppleMobileDevice(){

return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));

}

33、原生JavaScript判断是否苹果移动设备访问

function isAppleMobileDevice(){

return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));

}

34、原生JavaScript判断是否安卓移动设备访问

function isAndroidMobileDevice(){

return (/android/i.test(navigator.userAgent.toLowerCase()));

}

35、原生JavaScript判断是否Touch屏幕

function isTouchScreen(){

return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);

}

36、原生JavaScript判断是否在安卓上的谷歌浏览器

function isNewChromeOnAndroid(){

if(this.isAndroidMobileDevice()){

var userAgent = navigator.userAgent.toLowerCase();

if((/chrome/i.test(userAgent))){

var parts = userAgent.split('chrome/');

var fullVersionString = parts[1].split(" ")[0];

var versionString = fullVersionString.split('.')[0];

var version = parseInt(versionString);

if(version >= 27){

return true;

}

}

}

return false;

}

37、原生JavaScript判断是否打开视窗

function isViewportOpen() {

return !!document.getElementById('wixMobileViewport');

}

38、原生JavaScript获取移动设备初始化大小

function getInitZoom(){

if(!this._initZoom){

var screenWidth = Math.min(screen.height, screen.width);

if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){

screenWidth = screenWidth/window.devicePixelRatio;

}

this._initZoom = screenWidth /document.body.offsetWidth;

}

return this._initZoom;

}

39、原生JavaScript获取移动设备最大化大小

function getZoom(){

var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);

if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){

screenWidth = screenWidth/window.devicePixelRatio;

}

var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;

var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");

if(FixViewPortsExperimentRunning){

return screenWidth / window.innerWidth;

}else{

return screenWidth / document.body.offsetWidth;

}

}

40、原生JavaScript获取移动设备屏幕宽度

function getScreenWidth(){

var smallerSide = Math.min(screen.width, screen.height);

var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;

var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");

if(fixViewPortsExperiment){

if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){

smallerSide = smallerSide/window.devicePixelRatio;

}

}

return smallerSide;

}

41、原生 JavaScript完美判断是否为网址

function IsURL(strUrl) {

var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i

if (regular.test(strUrl)) {

return true;

}

else {

return false;

}

}

42、原生JavaScript根据样式名称检索元素对象

function getElementsByClassName(name) {

var tags = document.getElementsByTagName('*') || document.all;

var els = [];

for (var i = 0; i < tags.length; i++) {

if (tags.className) {

var cs = tags.className.split(' ');

for (var j = 0; j < cs.length; j++) {

if (name == cs[j]) {

els.push(tags);

break

}

}

}

}

return els

}

43、原生JavaScript判断是否以某个字符串开头

String.prototype.startWith = function (s) {

return this.indexOf(s) == 0

}

44、原生JavaScript判断是否以某个字符串结束

String.prototype.endWith = function (s) {

var d = this.length - s.length;

return (d >= 0 && this.lastIndexOf(s) == d)

}

45、原生JavaScript返回IE浏览器的版本号

function getIE(){

if (window.ActiveXObject){

var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1];

return parseFloat(v.substring(0, v.indexOf(".")))

}

return false

}

46、原生JavaScript获取页面高度

function getPageHeight(){

var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"

? a

: g.documentElement;

return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);

}

47、原生JavaScript获取页面scrollLeft

function getPageScrollLeft(){

var a = document;

return a.documentElement.scrollLeft || a.body.scrollLeft;

}

48、原生JavaScript获取页面可视宽度

function getPageViewWidth(){

var d = document, a = d.compatMode == "BackCompat"

? d.body

: d.documentElement;

return a.clientWidth;

}

49、原生JavaScript获取页面宽度

function getPageWidth(){

var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"

? a

: g.documentElement;

return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);

}

50、原生JavaScript获取页面scrollTop

function getPageScrollTop(){

var a = document;

return a.documentElement.scrollTop || a.body.scrollTop;

}

51、原生JavaScript获取页面可视高度

function getPageViewHeight() {

var d = document, a = d.compatMode == "BackCompat"

? d.body

: d.documentElement;

return a.clientHeight;

}

52、原生JavaScript跨浏览器添加事件

function addEvt(oTarget,sEvtType,fnHandle){

if(!oTarget){return;}

if(oTarget.addEventListener){

oTarget.addEventListener(sEvtType,fnHandle,false);

}else if(oTarget.attachEvent){

oTarget.attachEvent("on" + sEvtType,fnHandle);

}else{

oTarget["on" + sEvtType] = fnHandle;

}

}

53、原生JavaScript跨浏览器删除事件

function delEvt(oTarget,sEvtType,fnHandle){

if(!oTarget){return;}

if(oTarget.addEventListener){

oTarget.addEventListener(sEvtType,fnHandle,false);

}else if(oTarget.attachEvent){

oTarget.attachEvent("on" + sEvtType,fnHandle);

}else{

oTarget["on" + sEvtType] = fnHandle;

}

}

54、原生JavaScript去掉url前缀

function removeUrlPrefix(a){

a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/");

while(trim(a).toLowerCase().indexOf("http://")==0){

a=trim(a.replace(/http:\/\//i,""));

}

return a;

}

55、原生JavaScript随机数时间戳

function uniqueId(){

var a=Math.random,b=parseInt;

return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());

}

56、原生JavaScript全角半角转换,iCase: 0全到半，1半到全，其他不转化

function chgCase(sStr,iCase){

if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){

return sStr;

}

var i,oRs=[],iCode;

if(iCase){/*半->全*/

for(i=0; i

iCode = sStr.charCodeAt(i);

if(iCode == 32){

iCode = 12288;

}else if(iCode < 127){

iCode += 65248;

}

oRs.push(String.fromCharCode(iCode));

}

}else{/*全->半*/

for(i=0; i

iCode = sStr.charCodeAt(i);

if(iCode == 12288){

iCode = 32;

}else if(iCode > 65280 && iCode < 65375){

iCode -= 65248;

}

oRs.push(String.fromCharCode(iCode));

}

}

return oRs.join("");

}

57、原生JavaScript确认是否键盘有效输入值

function checkKey(iKey){

if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/

if(iKey>47 && iKey < 58){return true;}/*数字*/

if(iKey>64 && iKey < 91){return true;}/*字母*/

if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/

if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/

if(iKey>185 && iKey < 193){return true;}/*符号1*/

if(iKey>218 && iKey < 223){return true;}/*符号2*/

return false;

}

58、原生JavaScript获取网页被卷去的位置

function getScrollXY() {

return document.body.scrollTop ? {

x: document.body.scrollLeft,

y: document.body.scrollTop

}: {

x: document.documentElement.scrollLeft,

y: document.documentElement.scrollTop

}

}

59、原生JavaScript另一种正则日期格式化函数+调用方法

Date.prototype.format = function(format){ //author: meizz

var o = {

"M+" : this.getMonth()+1, //month

"d+" : this.getDate(), //day

"h+" : this.getHours(), //hour

"m+" : this.getMinutes(), //minute

"s+" : this.getSeconds(), //second

"q+" : Math.floor((this.getMonth()+3)/3), //quarter

"S" : this.getMilliseconds() //millisecond

}

if(/(y+)/.test(format)) format=format.replace(RegExp.$1,

(this.getFullYear()+"").substr(4 - RegExp.$1.length));

for(var k in o)if(new RegExp("("+ k +")").test(format))

format = format.replace(RegExp.$1,

RegExp.$1.length==1 ? o[k] :

("00"+ o[k]).substr((""+ o[k]).length));

return format;

}

alert(new Date().format("yyyy-MM-dd hh:mm:ss"));

60、原生JavaScript时间个性化输出功能

/*

1、< 60s, 显示为“刚刚”

2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”

3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”

4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”

5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”

*/

function timeFormat(time){

var date = new Date(time)

, curDate = new Date()

, year = date.getFullYear()

, month = date.getMonth() + 1

, day = date.getDate()

, hour = date.getHours()

, minute = date.getMinutes()

, curYear = curDate.getFullYear()

, curHour = curDate.getHours()

, timeStr;

if(year < curYear){

timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute;

}else{

var pastTime = curDate - date

, pastH = pastTime/3600000;

if(pastH > curHour){

timeStr = month +'月'+ day +'日 '+ hour +':'+ minute;

}else if(pastH >= 1){

timeStr = '今天 ' + hour +':'+ minute +'分';

}else{

var pastM = curDate.getMinutes() - minute;

if(pastM > 1){

timeStr = pastM +'分钟前';

}else{

timeStr = '刚刚';

}

}

}

return timeStr;

}

61、原生JavaScript解决offsetX兼容性问题

// 针对火狐不支持offsetX/Y

function getOffset(e){

var target = e.target, // 当前触发的目标对象

eventCoord,

pageCoord,

offsetCoord;

// 计算当前触发元素到文档的距离

pageCoord = getPageCoord(target);

// 计算光标到文档的距离

eventCoord = {

X : window.pageXOffset + e.clientX,

Y : window.pageYOffset + e.clientY

};

// 相减获取光标到第一个定位的父元素的坐标

offsetCoord = {

X : eventCoord.X - pageCoord.X,

Y : eventCoord.Y - pageCoord.Y

};

return offsetCoord;

}

function getPageCoord(element){

var coord = { X : 0, Y : 0 };

// 计算从当前触发元素到根节点为止，

// 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和

while (element){

coord.X += element.offsetLeft;

coord.Y += element.offsetTop;

element = element.offsetParent;

}

return coord;

}

62、原生JavaScript常用的正则表达式

//正整数

/^[0-9]*[1-9][0-9]*$/;

//负整数

/^-[0-9]*[1-9][0-9]*$/;

//正浮点数

/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;

//负浮点数

/^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;

//浮点数

/^(-?\d+)(\.\d+)?$/;

//email地址

/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;

//url地址

/^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;

//年/月/日(年-月-日、年.月.日)

/^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;

//匹配中文字符

/[\u4e00-\u9fa5]/;

//匹配帐号是否合法(字母开头，允许5-10字节，允许字母数字下划线)

/^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;

//匹配空白行的正则表达式

/\n\s*\r/;

//匹配中国邮政编码

/[1-9]\d{5}(?!\d)/;

//匹配×××

/\d{15}|\d{18}/;

//匹配国内电话号码

/(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;

//匹配IP地址

/((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;

//匹配首尾空白字符的正则表达式

/^\s*|\s*$/;

//匹配HTML标记的正则表达式

< (\S*?)[^>]*>.*?|< .*? />;

63、原生JavaScript实现返回顶部的通用方法

function backTop(btnId) {

var btn = document.getElementById(btnId);

var d = document.documentElement;

var b = document.body;

window.onscroll = set;

btn.style.display = "none";

btn.onclick = function() {

btn.style.display = "none";

window.onscroll = null;

this.timer = setInterval(function() {

d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);

b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);

if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);

},

10);

};

function set() {

btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none"

}

};

backTop('goTop');

64、原生JavaScript获得URL中GET参数值

// 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]

function get_get(){

querystr = window.location.href.split("?")

if(querystr[1]){

GETs = querystr[1].split("&")

GET =new Array()

for(i=0;i

tmp_arr = GETs.split("=")

key=tmp_arr[0]

GET[key] = tmp_arr[1]

}

}

return querystr[1];

}

65、原生JavaScript实现全选通用方法

function checkall(form, prefix, checkall) {

var checkall = checkall ? checkall : 'chkall';

for(var i = 0; i < form.elements.length; i++) {

var e = form.elements;

if(e.type=="checkbox"){

e.checked = form.elements[checkall].checked;

}

}

}

66、原生JavaScript实现全部取消选择通用方法

function uncheckAll(form) {

for (var i=0;i

var e = form.elements;

if (e.name != 'chkall')

e.checked=!e.checked;

}

}

67、原生JavaScript实现打开一个窗体通用方法

function openWindow(url,windowName,width,height){

var x = parseInt(screen.width / 2.0) - (width / 2.0);

var y = parseInt(screen.height / 2.0) - (height / 2.0);

var isMSIE= (navigator.appName == "Microsoft Internet Explorer");

if (isMSIE) {

var p = "resizable=1,location=no,scrollbars=no,width=";

p = p+width;

p = p+",height=";

p = p+height;

p = p+",left=";

p = p+x;

p = p+",top=";

p = p+y;

retval = window.open(url, windowName, p);

} else {

var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" );

eval("try { win.resizeTo(width, height); } catch(e) { }");

win.focus();

}

}

68、原生JavaScript判断是否为客户端设备

function client(o){

var b = navigator.userAgent.toLowerCase();

var t = false;

if (o == 'isOP'){

t = b.indexOf('opera') > -1;

}

if (o == 'isIE'){

t = b.indexOf('msie') > -1;

}

if (o == 'isFF'){

t = b.indexOf('firefox') > -1;

}

return t;

}

69、原生JavaScript获取单选按钮的值

function get_radio_value(field){

if(field&&field.length){

for(var i=0;i

if(field.checked){

return field.value;

}

}

}else {

return ;

}

}

70、原生JavaScript获取复选框的值

function get_checkbox_value(field){

if(field&&field.length){

for(var i=0;i

if(field.checked && !field.disabled){

return field.value;

}

}

}else {

return;

}

}

71、原生JavaScript判断是否为邮箱

function isEmail(str){

var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;

if (re.test(str) != true) {

return false;

}else{

return true;

}

}

72、原生JavaScript判断是否有列表中的危险字符

function isValidReg(chars){

var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/;

if (re.test( chars) == true) {

return false;

}else{

return true;

}

}

73、原生JavaScript判断字符串是否大于规定的长度

function isValidLength(chars, len) {

if (chars.length < len) {

return false;

}

return true;

}

74、原生JavaScript判断字符串是为网址不区分大小写

function isValidURL( chars ) {

var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;

if (!isNULL(chars)) {

chars = jsTrim(chars);

if (chars.match(re) == null)

return false;

else

return true;

}

return false;

}

75、原生JavaScript判断字符串是否为小数

function isValidDecimal( chars ) {

var re=/^\d*\.?\d{1,2}$/;

if (chars.match(re) == null)

return false;

else

return true;

}

76、原生JavaScript判断字符串是否为整数

function isNumber( chars ) {

var re=/^\d*$/;

if (chars.match(re) == null)

return false;

else

return true;

}

77、原生JavaScript判断字符串是否为浮点数

function isFloat( str ) {

for(i=0;i

if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){

return false;

}

}

return true;

}

78、原生JavaScript判断字符是否为A-Za-z英文字母

function isLetters( str ){

var re=/^[A-Za-z]+$/;

if (str.match(re) == null)

return false;

else

return true;

}

79、原生JavaScript判断字符串是否邮政编码

function isValidPost( chars ) {

var re=/^\d{6}$/;

if (chars.match(re) == null)

return false;

else

return true;

}

80、原生JavaScript判断字符是否空NULL

function isNULL( chars ) {

if (chars == null)

return true;

if (jsTrim(chars).length==0)

return true;

return false;

}

81、原生JavaScript用正则表达式提取页面代码中所有网址

var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");

alert(aa)

82、原生JavaScript用正则表达式清除相同的数组(低效率)

Array.prototype.unique=function(){

return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse();

};

83、原生JavaScript用正则表达式清除相同的数组(高效率)

String.prototype.unique=function(){

var x=this.split(/[\r\n]+/);

var y='';

for(var i=0;i

if(!new RegExp("^"+x.replace(/([^\w])/ig,"\\$1")+"[ DISCUZ_CODE_2 ]quot;,"igm").test(y)){

y+=x+"\r\n"

}

}

return y

};

84、原生JavaScript用正则表达式按字母排序，对每行进行数组排序

function SetSort(){

var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序

var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序

K1.value=K1.value!=text?text:test;

}

85、原生JavaScript字符串反序

function IsReverse(text){

return text.split('').reverse().join('');

}

86、原生JavaScript用正则表达式清除html代码中的脚本

function clear_script(){

K1.value=K1.value.replace(/[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");

}

87、原生JavaScript动态执行JavaScript脚本

function javascript(){

try{

eval(K1.value);

}catch(e){

alert(e.message);

}

}

88、原生JavaScript动态执行VBScript脚本

function vbscript(){

try{

var script=document.getElementById("K1").value;

if(script.trim()=="")return;

window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If',"vbscript")

}catch(e){

alert(e.message);

}

}

89、原生JavaScript实现金额大写转换函数

function transform(tranvalue) {

try {

var i = 1;

var dw2 = new Array("", "万", "亿"); //大单位

var dw1 = new Array("拾", "佰", "仟"); //小单位

var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用

//以下是小写转换成大写显示在合计大写的文本框中

//分离整数与小数

var source = splits(tranvalue);

var num = source[0];

var dig = source[1];

//转换整数部分

var k1 = 0; //计小单位

var k2 = 0; //计大单位

var sum = 0;

var str = "";

var len = source[0].length; //整数的长度

for (i = 1; i <= len; i++) {

var n = source[0].charAt(len - i); //取得某个位数上的数字

var bn = 0;

if (len - i - 1 >= 0) {

bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字

}

sum = sum + Number(n);

if (sum != 0) {

str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面

if (n == '0') sum = 0;

}

if (len - i - 1 >= 0) { //在数字范围内

if (k1 != 3) { //加小单位

if (bn != 0) {

str = dw1[k1].concat(str);

}

k1++;

} else { //不加小单位，加大单位

k1 = 0;

var temp = str.charAt(0);

if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位

str = str.substr(1, str.length - 1);

str = dw2[k2].concat(str);

sum = 0;

}

}

if (k1 == 3) //小单位到千则大单位进一

{

k2++;

}

}

//转换小数部分

var strdig = "";

if (dig != "") {

var n = dig.charAt(0);

if (n != 0) {

strdig += dw[Number(n)] + "角"; //加数字

}

var n = dig.charAt(1);

if (n != 0) {

strdig += dw[Number(n)] + "分"; //加数字

}

}

str += "元" + strdig;

} catch(e) {

return "0元";

}

return str;

}

//拆分整数与小数

function splits(tranvalue) {

var value = new Array('', '');

temp = tranvalue.split(".");

for (var i = 0; i < temp.length; i++) {

value = temp;

}

return value;

}

90、原生JavaScript常用的正则表达式大收集

匹配中文字符的正则表达式： [\u4e00-\u9fa5]

匹配双字节字符(包括汉字在内)：[^\x00-\xff]

匹配空行的正则表达式：\n[\s| ]*\r

匹配 HTML 标记的正则表达式：<(.*)>.*<\/\1>|<(.*) \/>

匹配首尾空格的正则表达式：(^\s*)|(\s*$)

匹配 IP 地址的正则表达式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g

匹配 Email 地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

匹配网址 URL 的正则表达式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?

sql 语句：^(select|drop|delete|create|update|insert).*[ DISCUZ_CODE_39 ]nbsp;

非负整数：^\d+[ DISCUZ_CODE_39 ]nbsp;

正整数：^[0-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;

非正整数：^((-\d+)|(0+))[ DISCUZ_CODE_39 ]nbsp;

负整数：^-[0-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;

整数：^-?\d+[ DISCUZ_CODE_39 ]nbsp;

非负浮点数：^\d+(\.\d+)?[ DISCUZ_CODE_39 ]nbsp;

正浮点数：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))[ DISCUZ_CODE_39 ]nbsp;

非正浮点数：^((-\d+\.\d+)?)|(0+(\.0+)?))[ DISCUZ_CODE_39 ]nbsp;

英文字符串：^[A-Za-z]+[ DISCUZ_CODE_39 ]nbsp;

英文大写串：^[A-Z]+[ DISCUZ_CODE_39 ]nbsp;

英文小写串：^[a-z]+[ DISCUZ_CODE_39 ]nbsp;

英文字符数字串：^[A-Za-z0-9]+[ DISCUZ_CODE_39 ]nbsp;

英数字加下划线串：^\w+[ DISCUZ_CODE_39 ]nbsp;

E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+[ DISCUZ_CODE_39 ]nbsp;

URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*[ DISCUZ_CODE_39 ]nbsp;

邮政编码：^[1-9]\d{5}[ DISCUZ_CODE_39 ]nbsp;

电话号码：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?[ DISCUZ_CODE_39 ]nbsp;

手机号码：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}[ DISCUZ_CODE_39 ]nbsp;

双字节字符(包括汉字在内)：^\x00-\xff

匹配首尾空格：(^\s*)|(\s*$)

匹配 HTML 标记：<(.*)>.*<\/\1>|<(.*) \/>

匹配空行：\n[\s| ]*\r

提取信息中的网络链接：(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?

提取信息中的邮件地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

提取信息中的图片链接：(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?

提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+)

提取信息中的中国手机号码：(86)*0*13\d{9}

提取信息中的中国固定电话号码：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}

提取信息中的中国电话号码(包括移动和固定电话)：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}

提取信息中的中国邮政编码：[1-9]{1}(\d+){5}

提取信息中的浮点数(即小数)：(-?\d*)\.?\d+

提取信息中的任何数字 ：(-?\d*)(\.\d+)?

IP：(\d+)\.(\d+)\.(\d+)\.(\d+)

电话区号：^0\d{2,3}$

腾讯 QQ 号：^[1-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;

帐号(字母开头，允许 5-16 字节，允许字母数字下划线)：^[a-zA-Z][a-zA-Z0-9_]{4,15}[ DISCUZ_CODE_39 ]nbsp;

中文、英文、数字及下划线：^[\u4e00-\u9fa5_a-zA-Z0-9]+$

91、原生JavaScript实现窗体改变事件resize的操作(兼容所以的浏览器)

(function(){

var fn = function(){

var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth

,r = 1255

,b = Element.extend(document.body)

,classname = b.className;

if(w < r){

//当窗体的宽度小于1255的时候执行相应的操作

}else{

//当窗体的宽度大于1255的时候执行相应的操作

}

}

if(window.addEventListener){

window.addEventListener('resize', function(){ fn(); });

}else if(window.attachEvent){

window.attachEvent('onresize', function(){ fn(); });

}

fn();

})();

92、原生JavaScript用正则清除空格分左右

function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }

function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }

function trim(s){ return ltrim(rtrim(s));}

93、原生JavaScript判断变量是否空值

/**

* 判断变量是否空值

* undefined, null, '', false, 0, [], {} 均返回true，否则返回false

*/

function empty(v){

switch (typeof v){

case 'undefined' : return true;

case 'string' : if(trim(v).length == 0) return true; break;

case 'boolean' : if(!v) return true; break;

case 'number' : if(0 === v) return true; break;

case 'object' :

if(null === v) return true;

if(undefined !== v.length && v.length==0) return true;

for(var k in v){return false;} return true;

break;

}

return false;

}

94、原生JavaScript实现base64解码

function base64_decode(data){

var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];

if (!data) { return data; }

data += '';

do {

h1 = b64.indexOf(data.charAt(i++));

h2 = b64.indexOf(data.charAt(i++));

h3 = b64.indexOf(data.charAt(i++));

h4 = b64.indexOf(data.charAt(i++));

bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;

o1 = bits >> 16 & 0xff;

o2 = bits >> 8 & 0xff;

o3 = bits & 0xff;

if (h3 == 64) {

tmp_arr[ac++] = String.fromCharCode(o1);

} else if (h4 == 64) {

tmp_arr[ac++] = String.fromCharCode(o1, o2);

} else {

tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);

}

} while (i < data.length);

dec = tmp_arr.join('');

dec = utf8_decode(dec);

return dec;

}

95、原生JavaScript实现utf8解码

function utf8_decode(str_data){

var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += '';

while (i < str_data.length) {

c1 = str_data.charCodeAt(i);

if (c1 < 128) {

tmp_arr[ac++] = String.fromCharCode(c1);

i++;

} else if (c1 > 191 && c1 < 224) {

c2 = str_data.charCodeAt(i + 1);

tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));

i += 2;

} else {

c2 = str_data.charCodeAt(i + 1);

c3 = str_data.charCodeAt(i + 2);

tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));

i += 3;

}

}

return tmp_arr.join('');

}

96、原生JavaScript获取窗体可见范围的宽与高

function getViewSize(){

var de=document.documentElement;

var db=document.body;

var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth;

var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight;

return Array(viewW ,viewH);

}

96、原生JavaScript判断IE版本号(既简洁、又向后兼容！)

var _IE = (function(){

var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i');

while (

div.innerHTML = '',

all[0]

);

return v > 4 ? v : false ;

}());

97、原生JavaScript获取浏览器版本号

function browserVersion(types) {

var other = 1;

for (i in types) {

var v = types ? types : i;

if (USERAGENT.indexOf(v) != -1) {

var re = new RegExp(v + '(\\/|\\s|: )([\\d\\.]+)', 'ig');

var matches = re.exec(USERAGENT);

var ver = matches != null ? matches[2] : 0;

other = ver !== 0 && v != 'mozilla' ? 0 : other;

} else {

var ver = 0;

}

eval('BROWSER.' + i + '= ver');

}

BROWSER.other = other;

}

98、原生JavaScript判断鼠标是否移出事件

function isMouseOut(e, handler) {

if (e.type !== 'mouseout') {

return false;

}

var reltg = e.relatedTarget ? e.relatedTarget : e.type === 'mouseout' ? e.toElement : e.fromElement;

while (reltg && reltg !== handler) {

reltg = reltg.parentNode;

}

return (reltg !== handler);

}

99、原生JavaScript半角转换为全角函数

function ToDBC(str){

var result = '';

for(var i=0; i < str.length; i++){

code = str.charCodeAt(i);

if(code >= 33 && code <= 126){

result += String.fromCharCode(str.charCodeAt(i) + 65248);

}else if (code == 32){

result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);

}else{

result += str.charAt(i);

}

}

return result;

}

100、原生JavaScript全角转换为半角函数

function ToCDB(str){

var result = '';

for(var i=0; i < str.length; i++){

code = str.charCodeAt(i);

if(code >= 65281 && code <= 65374){

result += String.fromCharCode(str.charCodeAt(i) - 65248);

}else if (code == 12288){

result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);

}else{

result += str.charAt(i);

}

}

return result;

}

转载地址:http://itindex.net/detail/47244-javascript