jquery ajax loading效果

<script type="text/javascript" src="jquery-1.3.2.js"></script>
<script type="text/javascript">
$(function() {
$("#loading_img").click(
function()
{
$.ajax({
type:"GET",
url:"demo.php",
data:"name=wuxiaoyong",
beforeSend:loading,//執行ajax前執行loading函數.直到success
success:Response //成功時執行Response函數
})
}
)
});
function loading(){
$('#loading_img').html('<img src="images/loading.gif"/>');
}
function Response(data){
$('#loading_img').html(data);
}
</script>

<div id="loading_img">點擊載入</div>