ajax以变量的形式传递参数

<script type="text/javascript">
		function helepRoom(helpname,helpvalue) {
            var data = {};
            data[helpname]=helpvalue;
            $.ajax({
                async:true,
                type:"post",
                url:"${ctxPath!}/pc/helpRoom/json",
                data:data,
                dataType:"json",
                success:function (data) {
                    $.each(data , function(i, n){
                        var li = $("<li><a href=''><div class='list_pic'><img src='' title='' alt=''></div><p class='p1'></p><p class='p2'></p><p class='p3'><span></span><span></span></p></a></li>");
                        $("#bnxf").append(li);
                    });
                }
            });
        }
	</script>