获取url后的指定参数

用法： getParam("v");

function getParam(paramName) {
paramValue = "", isFound = !1;
if (this.location.search.indexOf("?") == 0 && this.location.search.indexOf("=") > 1) {
arrSource = unescape(this.location.search).substring(1, this.location.search.length).split("&"), i = 0;
while (i < arrSource.length && !isFound) arrSource[i].indexOf("=") > 0 && arrSource[i].split("=")[0].toLowerCase() == paramName.toLowerCase() && (paramValue = arrSource[i].split("=")[1], isFound = !0), i++
}
return paramValue == "" && (paramValue = null), paramValue
}

可取中文：

function getUrlParam(key){
// 获取参数
var url = window.location.search;
// 正则筛选地址栏
var reg = new RegExp("(^|&)"+ key +"=([^&]*)(&|$)");
// 匹配目标参数
var result = url.substr(1).match(reg);
//返回参数值
return result ? decodeURIComponent(result[2]) : null;
}