得到url后面的参数

function GetQueryString(name){
    var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
    var r = window.location.search.substr(1).match(reg);
    if(r!=null){
       return decodeURIComponent(r[2]);
    }else{
       return null;
    } 
 }
 document.write("name = "+ GetQueryString("name")+"<br />");
 document.write("age ="+ GetQueryString("age"));
# </script>