javascript 截取url参数

        var url="http://127.0.0.1:8080/photo/list.jsp?page=2&user=hongchen";
        var params_arr = url.substr(url.indexOf('?')+1).split("&");
        var params = new Array();
        for (var i = params_arr.length - 1; i >= 0; i--) {
            params[params_arr[i].split("=")[0]] = params_arr[i].split("=")[1];
        };
        alert(params["page"]);