简单案例

  • 案例一:完成“鼠标经过切换图片”的案例
  • 案例二:完成“百度换肤效果”的案例
  • 案例三:完成“鼠标展示”的案例
  • 案例四:完成“表单验证”的案例;改进并完成对密码进行确认操作,参考“注册.html”
  • 案例五:结合改进的“表单验证”优化“模态框”案例(自行设计)。
  • 案例六:完成“二级联动菜单”的案例
  • 案例七:完成“星星案例”的案例
  • 案例八:完成“图片的切换”的案例
  • 案例九:计时器
  • 案例十:完成“文件格式验证”的案例
  • 案例十一:完成“左右轮播图”的案例

案例一:完成“鼠标经过切换图片”的案例

代码:

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title></head><body><img src="img/images/jd1.png" id="demo" /><script>var demo = document.getElementById("demo");demo.onmouseover = function(){demo.src = "img/images/jd2.png"}demo.onmouseout = function(){demo.src = "img/images/jd1.png"}</script></body>
</html>


案例二:完成“百度换肤效果”的案例

代码:

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title><style>*{margin: 0;padding: 0;}body{background: url(img/1.jpg) top center;}.box{height: 200px;background: rgba(255,255,2555,.3);text-align: center;padding-top: 50px;}</style><script>
/*          window.οnlοad=function(){//页面加载完毕之后,放在任何地方内部放js}*/window.onload=function(){/*var demo1 = document.getElementById("demo1");var demo2 = document.getElementById("demo2");var demo3 = document.getElementById("demo3");demo1.onclick = function(){document.body.style.backgroundImage="url(img/1.jpg)";}demo2.οnclick= function(){document.body.style.backgroundImage="url(img/2.jpg)";}demo3.onclick = function(){document.body.style.backgroundImage="url(img/3.jpg)";}*/var demo = document.getElementsByName("demo");demo[0].onclick = function(){document.body.style.backgroundImage="url(img/1.jpg)";}demo[1].onclick= function(){document.body.style.backgroundImage="url(img/2.jpg)";}demo[2].onclick = function(){document.body.style.backgroundImage="url(img/3.jpg)";}}</script></head><body><div class="box"><img src="img/1.jpg" alt="" width="150" name = "demo"/><img src="img/2.jpg" alt="" width="150" name = "demo"/><img src="img/3.jpg" alt="" width="150" name = "demo"/></div></body>
</html>


案例三:完成“鼠标展示”的案例

代码:

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title><style>*{margin: 0;padding: 0;}ul{list-style: none;}#box{height:70px;width: 360px;padding-top: 360px;border:1px solid #ccc;margin: 100px auto;overflow: hidden;background: url(img/01big.jpg) no-repeat;}#box li{float: left;}#box ul{overflow: hidden;border-top: 1px solid #ccc;}</style><script>window.onload = function(){var box = document.getElementById("box");function mfn(liid,bg){var obj = document.getElementById(liid);obj.onmouseover = function(){box.style.backgroundImage=bg;}}mfn("li01","url(img/01big.jpg)");mfn("li02","url(img/02big.jpg)");mfn("li03","url(img/03big.jpg)");mfn("li04","url(img/04big.jpg)");mfn("li05","url(img/05big.jpg)");}</script></head><body> <div id="box"><ul><li id="li01" ><img src="img/01.jpg" alt=""  name="bg"/></li><li id="li02"><img src="img/02.jpg" alt=""  name="bg"/></li><li id="li03"><img src="img/03.jpg" alt=""  name="bg" /></li><li id="li04"><img src="img/04.jpg" alt=""  name="bg" /></li><li id="li05"><img src="img/05.jpg" alt=""  name="bg" /></li></ul></div></body>
</html>


案例四:完成“表单验证”的案例;改进并完成对密码进行确认操作,参考“注册.html”

代码:

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title>注册页面</title><script type="text/javascript">//验证用户名function focus_username(){var divobj = document.getElementById("result_username");divobj.innerHTML="(请输入你的用户名)";divobj.style.color="#CCCCCC";}function blur_username(){var inputobj = document.form1.username;var divobj = document.getElementById("result_username");if(inputobj.value==""){//当用户名为空divobj.innerHTML = "(对不起,用户名不能为空)";divobj.style.color = "red";return false;}else if(inputobj.value.length<5 || inputobj.value.length>20){divobj.innerHTML = "(对不起,用户名长度只能为5-20个字符之间)";divobj.style.color = "red";return false;}else{divobj.innerHTML = "<img src='img/ok.gif' />";return true;}}//验证密码function focus_userpwd(){var divobj = document.getElementById("result_userpwd");divobj.innerHTML="(请输入你的密码)";divobj.style.color="#CCCCCC";}function blur_userpwd(){var inputobj = document.form1.userpwd;var divobj = document.getElementById("result_userpwd");if(inputobj.value==""){//当用户名为空divobj.innerHTML = "(对不起,密码不能为空)";divobj.style.color = "red";return false;}else if(inputobj.value.length<5 || inputobj.value.length>20){divobj.innerHTML = "(对不起,密码长度只能为5-20个字符之间)";divobj.style.color = "red";return false;}else{divobj.innerHTML = "<img src='img/ok.gif' />";return true;}}//再次输入密码确认function focus_confirm(){var divobj = document.getElementById("result_confirm");divobj.innerHTML = "(请再次输入密码)";divobj.style.color="#CCCCCC";  }function blur_confirm(){var inputobjco = document.form1.confirm;var divobj = document.getElementById("result_confirm");var inputobjpasswd = document.form1.userpwd;if(inputobjpasswd.value==inputobjco.value){divobj.innerHTML = "<img src='img/ok.gif' />";return true;}else{divobj.innerHTML = "(两次密码不一致,请重新输入)";divobj.style.color="red";   return false;}}function checkEorm(){var username = blur_username();var userpwd =  blur_userpwd();var confirm = blur_confirm();if(username && userpwd && confirm){return true;}else{return false;}}</script></head><body><form name="form1" method="post" action="https://www.csdn.net/" onsubmit="return checkEorm()"><table width="600px" border="1"m bordercolor="#ccc" rules="all" align="center" cellpadding="5"><tr><th colspan="3" bgcolor="crimson">新用户注册</th></tr><tr><td width="80px" align="right">用户名</td><td><input type="text" name="username" onfocus="focus_username()" onblur="blur_username()" /></td><td width="350"><div id="result_username"></div></td></tr><tr><td width="80" align="right">密码</td><td><input type="password" name="userpwd" onfocus="focus_userpwd()" onblur="blur_userpwd()"/></td><td><div id="result_userpwd"></div></td></tr><tr><td width="80" align="right">密码确认</td><td><input type="password" name="confirm" onfocus="focus_confirm()" onblur="blur_confirm()"/></td><td><div id="result_confirm"></div></td></tr><tr><td>&nbsp;</td><td colspan="2"><input type="submit" value="注册" /></td></tr></table></form></body>
</html>




案例五:结合改进的“表单验证”优化“模态框”案例(自行设计)。

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title><script>//鼠标停留边颜色</script><style type="text/css">.main{text-align: center;}#div1{position: fixed;width: 1080px;height: 608px;background:url(img/QQ背景.jpg);align-content: center;left: 20%;top: 0%;}#div2{margin-left: 140px;margin-top:3px;float: left;}#div3{width: auto;margin-left:300px ;margin-top:20px;float: left;}#div4{width: 1080px;height: 100px;}form{}table{width: auto;margin: 10px;font-size: 25px;font-family:courier;}#div5{margin-left: 200px;width: 500px;height: 100px;}#div5_1{width: 230px;height: 55px;margin-left: 8px;float: left;font-size: 50px;font-family:;}#div5_2{//margin-left: 90px;float: right;width: 260px;height: 55px;color: crimson;font-size: 20px;}#div5_3{font-size: 30px;font-family:"bradley hand itc";color:antiquewhite;}#div6{margin-right: 20px;float: right;width: 700px;height: 370px;}#div6_1{margin-top: 10px;float: left;}#div6_2{margin-top: 10px;float: right;}#mask{width: 100%;height: 100%;background: rgba(0,0,0,.5);position: fixed;top: 0; left: 0;display: none;}#box{width: 500px;height: 350px;background-color:cornflowerblue;position: fixed;top: 50%;left: 50%;margin: -250px 0 0 -200px;display: none;}#box span{position: absolute;right: 10px;width: 15px;height: 15px;font-size: 30px;cursor: pointer;}#box-1{margin-left: 200px;float: left;}#box-2{width: 495px;height: 180px;margin-top: 90px;background-color:floralwhite;}#box-2-1{margin: 1px;}#box-2-2-1{width: 100px;height: 25px;float: left;margin-left: 40px;}#box-3{float: left;margin-left: 120px;margin-top: 20px;width: 237px;height: 38px;}</style><script>//菜单鼠标经过特效function omsu(id){var id = document.getElementById(id);id.style.backgroundColor="azure"}function omst(id){var id = document.getElementById(id);id.style.background="none";}//点击登录,产生页面function dll(){var dl = document.getElementById("dl");var mask = document.getElementById("mask");var box = document.getElementById("box");mask.style.display = "block";box.style.display = "block";//alert("的好时机");}//点击×号消除页面function cc(){var clone_all = document.getElementById("clone_all");mask.style.display = "none";box.style.display = "none";}//验证用户名function focus_username(){var divobj = document.getElementById("result_username");divobj.innerHTML="请输入你的账号";divobj.style.color="#CCCCCC";}function blur_username(){var inputobj = document.form1.username;var divobj = document.getElementById("result_username");if(inputobj.value==""){//当用户名为空divobj.innerHTML = "用户名不能为空";divobj.style.color = "red";return false;}else if(inputobj.value.length<5 || inputobj.value.length>20){divobj.innerHTML = "账号必须5-20位";divobj.style.color = "red";return false;}else{divobj.innerHTML = "<img src='img/ok.gif' />";return true;}}//验证密码function focus_userpwd(){var divobj = document.getElementById("result_userpwd");divobj.innerHTML="请输入你的密码";divobj.style.color="#CCCCCC";}function blur_userpwd(){var inputobj = document.form1.userpwd;var divobj = document.getElementById("result_userpwd");if(inputobj.value==""){//当用户名为空divobj.innerHTML = "密码不能为空";divobj.style.color = "red";return false;}else if(inputobj.value.length<5 || inputobj.value.length>20){divobj.innerHTML = "密码必须5-20位";divobj.style.color = "red";return false;}else{divobj.innerHTML = "<img src='img/ok.gif' />";return true;}}function checkEorm(){var username = blur_username();var userpwd =  blur_userpwd();if(username && userpwd){window.location.href="https://im.qq.com/";}else{return false;}}</script></head><body><div id="div1"><div id="mask"></div><div id="box"><div id="box-1"><img src="img/登录QQ企鹅标志.JPG"> </div><span id="clone_all" onclick="cc()">×</span><div id=box-2><div id="box-2-1"><br /><form name="form1"  method="post" ><table id="table2"><tr><td>账号:<input onfocus="focus_username()" name="username" onblur="blur_username()" ></td><td id="result_username"></td></tr><tr><td>密码:<input type="password" onfocus="focus_userpwd()" onblur="blur_userpwd()" name="userpwd"></td><td id="result_userpwd" ></td></tr></table></form></div><div id="box-2-2"><div id="box-2-2-1"><input type="checkbox">自动登录</div><div id="box-2-2-1"><input type="checkbox">记住密码</div><div id="box-2-2-1"><input type="checkbox">找回密码</div></div></div><div id="box-3" onclick="checkEorm()"><img src="img/登录按钮.JPG"></div></div><div id = "div4"><div id="div2"><form><table><tr><td ><img src="img/QQ标志.JPG"</td><td id="td1" onmouseover="omsu(this.id)" onmouseleave="omst(this.id)">首页</td><td id="td2" onmouseover="omsu(this.id)" onmouseleave="omst(this.id)">下载</td><td id="td3" onmouseover="omsu(this.id)" onmouseleave="omst(this.id)">动态</td></tr></table></form></div><div id="div3"><form><table cellpadding="5"><tr><td id="td4" onmouseover="omsu(this.id)" onmouseleave="omst(this.id)">注册</td><td id="td5" onmouseover="omsu(this.id)" onmouseleave="omst(this.id)">QQ会员</td><td id="td6" onmouseover="omsu(this.id)" onmouseleave="omst(this.id)">QQ安全</td></tr>                                                               </table></form></div></div><div id="div5"><div id = "div5_1">QQ·PC版</div><div id ="div5_2" ><br>点击这里登录:<input type="button" value="登录" onclick="dll()" ></div><div id="div5_3">全新改版,给你焕然一新的感觉!!!</div></div><div id="div6"><div id="div6_1"><img height="350px" width="300px" src="img/QQ界面.JPG"/></div><div id="div6_2"><img  height="350px" width="400px" src="img/聊天界面.JPG" /></div></div></div></body>
</html>





案例六:完成“二级联动菜单”的案例

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title><script type="text/javascript">var  arr_province =["请选择省市","北京市","上海市","重庆市","深圳市","广东省"];var arr_city = [["请选择城市/地区"],["东城区","西城区"],["宝山区","长宁区"],["和平区","和平区","河北区"],["俞中区"],["福田区"],["广州市"]];//二级联动初始化function initt(){var province = document.form1.province;var city = document.form1.city;var len = arr_province.length//alert(city)province.length=len;for(var i=0;i<len;i++){province.options[i].text = arr_province[i];province.options[i].value= arr_province[i];}var index=2;province.selectedIndex = index;var len = arr_city[index].length;city.length=len;for(var i=0; i<len;i++){city.options[i].text = arr_city[index][i];city.options[i].value= arr_city[index];}}function chage_select(index){//alert(index);var city = document.form1.city;var len = arr_city[index].length;//alert(len);city.length=len;  for(var i=0; i<len;i++){city.options[i].text = arr_city[index][i];city.options[i].value= arr_city[index][i];}}</script></head><body onload="initt()"><form name="form1">省份:<select name="province" onchange="chage_select(this.selectedIndex)"></select>城市:<select name="city"></select></form></body>
</html>


案例七:完成“星星案例”的案例

代码:

<!DOCTYPE html>
<html onclick="star()"><head><meta charset="UTF-8"><title></title><style>#span1{border: 1px solid red;width: 100px;display: inline-block;height: 20px;overflow: hidden;}#span2{display: inline-block;width: 0px;height: 20px;}</style><script>var count=0;var dingshiqi;var shijian=0;var gametime;window.onload = init;function init(){document.body.bgColor="#6495ED";}function star(){var obj = document.createElement("img");obj.src="img/星星案例/xingxing.gif";var w=Math.floor(Math.random()*(90-30+1))+30;obj.width=w;//var x= event.clientX;//var y =event.clientY;var x = Math.floor(Math.random()*1300)+30;var y = Math.floor(Math.random()*500)+30;obj.style.position="absolute";obj.style.top = y +"px";obj.style.left = x+"px";document.body.appendChild(obj);obj.onclick=removestar;count++;countxingxing();document.getElementById("span2").style.width=count*5+"px";document.getElementById("span2").style.backgroundColor="red";}function removestar(){this.parentNode.removeChild(this);count--;countxingxing();}function startxingxing(){window.setInterval("star()",1000);gametime=window.setInterval("youxishijian()",1000);}//暂停游戏function zanting(){alert("暂停游戏");}//星星个数 function countxingxing(){var shu =document.getElementById("count");if(count>20){alert("游戏结束");window.clearInterval(dingshiqi);window.clearInterval(gametime);}shu.innerHTML=count+"个星星";}//记录游戏时间function youxishijian(){var obj = document.getElementById("jishi");shijian++;obj.innerHTML="游戏进行"+shijian+"秒";}</script></head><body><span id= "count">0个星星</span><input type="button" value= "点击开始游戏" onclick="startxingxing()"/><input type="button" value="点击暂停游戏" onclick="zanting()"/><span id="jishi">游戏进行0秒</span><span id="span1"><span id="span2"></span></span></body>
</html>


案例八:完成“图片的切换”的案例

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title><style>div{width: 600px;border:1px solid red;overflow: hidden;}#img1{float: left;}#ull{float: right;margin: 0px;padding: 0px;margin: 0px 30px 0 0;}#ull li{list-style: none;border: 1px solid gray;padding: 0px;width: 30px;height: 20px;margin: 6px;line-height: 20px;text-align: center;}</style><script>var n=1;//图片标记数var dingshiqi;//图片动定时器window.onload=init;function init(){dingshiqi = window.setInterval("tupian()",1000);beijing= document.getElementById("li1");beijing.style.backgroundColor="orange";}//换图片函数function tupian(){var obj = document.getElementById("img1");n++;if(n>=7){n=1;}obj.src = "img/星星案例/dd_scroll_"+n+".jpg";for(var i=1;i<=6;i++){var li1=document.getElementById("li"+i);li1.style.backgroundColor="";}beijing = document.getElementById("li"+n);beijing.style.backgroundColor="orange";}//鼠标放上停止图片函数function stoptupian(){window.clearInterval(dingshiqi);}//鼠标离开图片继续动的函数function dongtupian(){dingshiqi=window.setInterval("tupian()",1000);}//鼠标放到li上停止图片查看指定的函数function tingtupian(i,lin){var obj = document.getElementById("img1");//该表对象src属性换图片n=i;obj.src="img/星星案例/dd_scroll_"+n+".jpg";//清除定时器window.clearInterval(dingshiqi);huanbeijing(lin);}//让定时器继续换图片function jixu(){dingshiqi= window.setInterval("tupian()",1000);}function huanbeijing(lin){for(var m=1;m<=6;m++){var li1 = document.getElementById("li"+m);li1.style.backgroundColor="";}li1.style.backgroundColor="orange";}</script></head><body><img id="img1" src="img/星星案例/dd_scroll_1.jpg" onmouseout="dongtupian()" onmouseover="stoptupian()"><ul id="ull"><li id="li1" onmouseover="tingtupian(1,this)" onmouseout="jixu()">1</li><li id="li2" onmouseover="tingtupian(2,this)" onmouseout="jixu()">2</li><li id="li3" onmouseover="tingtupian(3,this)" onmouseout="jixu()">3</li><li id="li4" onmouseover="tingtupian(4,this)" onmouseout="jixu()">4</li><li id="li5" onmouseover="tingtupian(5,this)" onmouseout="jixu()">5</li><li id="li6" onmouseover="tingtupian(6,this)" onmouseout="jixu()">6</li> </ul></body>
</html>


案例九:计时器

代码:

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title><style>#div{font-size: 60px;margin:0  auto;width: 900px;border: 1px solid red;text-align: center;}</style><script type="text/javascript">var n1=window.setInterval("fn()",5000);function fn(){      //显示时间函数var d1=new Date;var obj=document.getElementById("div");obj.innerHTML=d1.toLocaleDateString();}function qingchu(){window.clearInterval(n1);}function jixu(){n1=window.setInterval("fn()",1000);}window.setTimeout("qingchu()",600);</script></head><body><div id="div"><input type="button" value="清除定时器" onclick="qingchu()"><input type="button" value="继续定时器" onclick="jixu()"></div></body>
</html>


案例十:完成“文件格式验证”的案例

代码:

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title></head><body><input type="file" name="" id="File"/><span></span>;</body>
</html>
<script>var file = document.getElementById("File");file.onchange = function(){var path = this.value;//得到现在的文件路径var suxxif = path.substr(path.lastIndexOf(".")).toUpperCase();if(suxxif == ".JPG" || suxxif == ".PNG"){this.nextSibling.innerHTML="格式正确";}else{this.nextSibling.innerHTML = "格式错误的";}}</script>


案例十一:完成“左右轮播图”的案例

代码:

<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title></title><style type="text/css">body,ul,ol,li,img{margin: 0;padding: 0;list-style: none;}#box{width: 490px;height: 170px;padding: 5px;position: relative;border: 1px solid #ccc;margin: 100px auto 0;overflow: hidden;}.ad{width: 490px;height: 170px;overflow: hidden;position: relative;}#box img{width: 490px;}.ad ol {position: absolute;;right: 10px;bottom: 10px;}.ad ol li{width: 20px;height: 20px;line-height: 20px;border: 1px solid #ccc;text-align: center;background: #fff;float: left;margin-right: 10px;cursor: pointer;display:inline}.ad ol li.current{background: yellow;}.ad ul li{float: left;}.ad ul{position: absolute;top: 0;width: 2940px;}.ad ul li.current{display: block;}#arr{display: none;}#arr span{width: 40px;height: 40px;position: absolute;left: 5px;top:50%;margin-top:-20px ;background: #000;cursor: pointer;line-height: 40px;text-align: center;font-weight: bold;font-family: '黑体';font-size: 30px;color: #fff;opacity: 0.3;border: 1px solid #fff;}#arr #right{right: 5px;left: auto;}</style></head><body><div id="box" class=""all"><div class="ad"><ul id="imgs"><li><img src="img/ig1/1.jpg" /></li><li><img src="img/ig1/2.jpg" /></li><li><img src="img/ig1/3.jpg" /></li><li><img src="img/ig1/4.jpg" /></li><li><img src="img/ig1/5.jpg" /></li></ul></div><div id="arr"><span id="left"><</span><span id="right">></span></div></div><script>function $(id){return document.getElementById(id)}var box = document.getElementById("box");box.onmouseover = function(){$("arr").style.display = "block";}box.onmouseout = function(){$("arr").style.display = "none"}$("right").onclick = function(){target -=490;}$("left").onclick = function(){target +=490;  }//缓动动画var leader = 0,target = 0;setInterval(function(){if(target >=0){target = 0;}else if(target <= -1960){target = -1960;}leader = leader + (target - leader)/10;$("imgs").style.left = leader + "px";},30)
</script></body>
</html>


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