js 获取地址栏？后面的参数,实现文章栏目定位

html:

<div class="box">
    <ul>
          <li id="all">全部文章</li>
          <li id="category1">name1</li>
          <li id="category2">name2</li>   
    </ul>
<div>

　js

实例：www.xxx.com/index/article.html?url=all  获取all

<script>
    function getRequest() {
        var url = window.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]]=decodeURI(strs[i].split("=")[1]);
            }
        }
        return theRequest;
    }
    $url = getRequest();
    if(!($url.url)){var init = document.getElementById('all').childNodes;init[0].style.color = 'rgb(35, 178, 148)';}else{ var child;child = document.getElementById($url.url).childNodes;child[0].style.color = 'rgb(35, 178, 148)';}
</script>