客户端 request

<script language="JavaScript">
            <!--
            var request=function(str){     var qs=document.location.search;     var re=new RegExp("(?:^|)"+str+"=([^&]+)(?:\$|$)","gi").exec(qs);     if(re!=null)     return re[1];     else     return "";    
}
//演示
 alert("id="+(request("id")==‘‘?‘找不到参数‘request("id")))
            //-->
            </script>