js 读取cookie 与读取url地址栏

<script language="javascript">
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;
}
</script>

正则分析法

　　代码如下：
<script language="javascript">
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;
}
alert(GetQueryString("参数名1"));
alert(GetQueryString("参数名2"));
alert(GetQueryString("参数名3"));
</script>

<script language="javascript">
var cookies = document.cookie;
var start = cookies.indexOf("cookiename=");
if(start == -1){
 alert("The cookie not found");
}
start = cookies.indexOf("=", start) + 1;
var end = cookies.indexOf(";", start);
if(end == -1){
 end = cookies.length;
}
var value = unescape(cookies.substring(start, end));
if(value == null){
 alert("The cookie not found");
}
else{
 alert("The cookie value is:" + value);
}
</script>