JavaScript 获取 URL 参数的两种常用方法详解

getRequest : function() { 
   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;
  }

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

 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; 
 } 
 var req = GetRequest(); 
 var from = req['from']; 
 alert(from);