javaScript查询字符串参数获取

function getQueryStringArgs() {
 //取得查询字符串并去掉开头的问号
 var qs = (location.search.length > 0 ? location.search.substring(1) : "");

 //保存数据对象
 args = {};

 //取得每一项
 items = qs.length ? qs.split("&") : [],
 item = null;
 name = null;
 value = null;

 //for循环
 i = 0;
 len = items.length;

 //将每一项加入args对象中
 for (i = 0; i < len; i++) {
 item = items[i].split("=");
 name = decodeURIComponent(item[0]);
 value = decodeURIComponent(item[1]);

 if (name.length) {
 args[name] = value;
 }
 }
 return args;
}

//假设 ?q=javascript&num=10
var args = getQueryStringArgs();
alert(args["q"]);
alert(args["num"]);