//获取url参数的值：name是参数名function getQueryString(name) {var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");var r = window.location.search.substr(1).match(reg);if (r != null) {return (r[2]);}return null;}//设置url参数值，ref参数名,value新的参数值function changeURLPar(url, ref, value){var str = "";if (url.indexOf('?') != -1)str = url.substr(url.indexOf('?') + 1);elsereturn url + "?" + ref + "=" + value;var returnurl = "";var setparam = "";var arr;var modify = "0";if (str.indexOf('&') != -1) {arr = str.split('&');for (i in arr) {if (arr[i].split('=')[0] == ref) {setparam = value;modify = "1";}else {setparam = arr[i].split('=')[1];}returnurl = returnurl + arr[i].split('=')[0] + "=" + setparam + "&";}returnurl = returnurl.substr(0, returnurl.length - 1);if (modify == "0")if (returnurl == str)returnurl = returnurl + "&" + ref + "=" + value;}else {if (str.indexOf('=') != -1) {arr = str.split('=');if (arr[0] == ref) {setparam = value;modify = "1";}else {setparam = arr[1];}returnurl = arr[0] + "=" + setparam;if (modify == "0")if (returnurl == str)returnurl = returnurl + "&" + ref + "=" + value;}elsereturnurl = ref + "=" + value;}return url.substr(0, url.indexOf('?')) + "?" + returnurl;}//删除参数值function delQueStr(url, ref) {var str = "";if (url.indexOf('?') != -1) {str = url.substr(url.indexOf('?') + 1);}else {return url;}var arr = "";var returnurl = "";var setparam = "";if (str.indexOf('&') != -1) {arr = str.split('&');for (i in arr) {if (arr[i].split('=')[0] != ref) {returnurl = returnurl + arr[i].split('=')[0] + "=" + arr[i].split('=')[1] + "&";}}return url.substr(0, url.indexOf('?')) + "?" + returnurl.substr(0, returnurl.length - 1);}else {arr = str.split('=');if (arr[0] == ref) {return url.substr(0, url.indexOf('?'));}else {return url;}}}