你如何获取浏览器URL中查询字符串中的参数？

<script>

function showWindowHref(){
var sHref = window.location.href;
var args = sHref.split('?');
if(args[0] == sHref){
return "";
}
var arr = args[1].split('&');
var obj = {};
for(var i = 0;i< arr.length;i++){
var arg = arr[i].split('=');
obj[arg[0]] = arg[1];
}
return obj;
}
var href = showWindowHref(); // obj
console.log(href);           // {mod: "viewthread", tid: "2440", page: "1", extra: "#pid130737"}

</script>