URL参数解析问题

请编写一个JavaScript函数 parseQueryString，它的用途是把URL参数解析为一个对象，如：var url = ”http://www.taobao.com/index.php?key0=0&key1=1& key2=2…..”
var obj = parseQueryString(url);

传入参数的方法：

 <script type="text/javascript">
        var getQuery = function(query) {
            var oQuery = {};
            var iBegin = query.indexOf("?");
            var sQuery = query.substring(iBegin + 1);
            var aQuery = sQuery.split("&"); ;
            for (var i = 0; i < aQuery.length; i++) {
                var k = aQuery[i].indexOf("=");
                if (k == -1) continue;
                var key = aQuery[i].substring(0, k);
                var value = aQuery[i].substring(k + 1);
                oQuery[key] = value;
            }
            return oQuery;
        }
        var test = getQuery("http://www.taobao.com/index.php?key0=0&key1=1&key2=2");
    </script>