js获取url参数

一、正则

function getParam(key)
    {
         var reg = new RegExp("(^|&)"+ key+"=([^&]*)(&|$)");
         var r = window.location.search.substr(1).match(reg);
         if(r!=null)return  unescape(r[2]); return null;
    }

二、字符串

function GetRequest() { 
  var url = location.search; //获取url中"?"符后的字串 
  var theRequest = new Object(); 
  if (url.indexOf("?") != -1) { 
    var str = url.substr(1); 
    strs = str.split("&"); 
    for(var i = 0; i < strs.length; i ++) { 
    theRequest[strs[i].split("=")[0]]=unescape(strs[i].split("=")[1]); 
  }
  return theRequest;  
}