Afficher automatiquement le code js de la grande image après avoir passé la souris pendant trois secondes_compétences javascript

La grande image s'affichera après un survol de la souris pendant trois secondes, ce qui est assez pratique dans les pages web

<style>
*{margin:0;padding:0;list-style-type:none;}
img,a{border:0;}
.piccon{height:75px;margin:100px 0 0 50px;}
.piccon li{float:left;padding:0 10px;}
#preview{position:absolute;border:1px solid #ccc;background:#333;padding:5px;display:none;color:#fff;z-index:2000;}
</style>

<script type="text/javascript">
this.imagePreview = function(){

xOffset = 10;
yOffset = 30;
var urll;
$(".widget .ks-content a,.box .ks-switchable-content div li a").hover(function(){
//$(".widget .ks-content a").hover(function(e){
//var goods_id = $(this).attr("href").replace("goods/", "");
var goods_id = $(this).attr("href").replace("index.php&#63;app=goods&id=", "");
this.t = this.title;
this.title = " ";
var c = (this.t != "") &#63; "<br/>" + this.t : " ";

$.post("index.php&#63;app=default&act=ajaxBigImage", {goods_id: goods_id},function(data){
$.ajaxSettings.async = false;
if(data!=0){
urll = data;

$("body").append("<div id='preview'><img src="+ urll +" />"+ c +"</div>");
return true;
}else{
return false;
}
});
/*
$("#preview")
.css("top",(e.pageY - xOffset) + "px")
.css("left",(e.pageX + yOffset) + "px")
.fadeIn("fast");
*/
$('#preview').css({
position:'absolute',
left: ($(window).width() - $('#preview').outerWidth())/2,
top: ($(window).height() - $('#preview').outerHeight())/2 + $(document).scrollTop()
});

setTimeout(function(){
$("#preview").fadeIn("fast");
},3000)


},
function(){
this.title = this.t;
$("#preview").remove();
});

/*
$("a.preview").mousemove(function(e){
$("#preview")
.css("top",(e.pageY - xOffset) + "px")
.css("left",(e.pageX + yOffset) + "px");
});
*/

};

$(document).ready(function(){
imagePreview();
});

</script>


<div id="_widget_579" name="jdr_sale_list" widget_type="widget" class="widget">
<div class="sale_list mt10 clearfix">
<h2>销售排行</h2>
<div>
<ul class="ks-nav ks-nav1476271702">
<li class="ks-active nav1">特效礼花</li>
<li class="nav2">套餐烟花</li>
</ul>
<div class="ks-content">
<ul class="box" id="box1_1476271702">
<li >
<div class="pic"><a href="index.php&#63;app=goods&id=331"><img alt="【81发六锦系列组合烟花】" src="data/files/store_927/goods_51/small_201312121557314803.JPG" height="60" width="60"></a><b>1</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=331">【81发六锦系列组合烟花】</a></div>
<div class="price">&yen;200.00</div>
</div>
</li>
<li >
<div class="pic"><a href="index.php&#63;app=goods&id=336"><img alt="【八喜系列组合烟花】五福临门、六六大顺、七星高照、八方得利" src="data/files/store_927/goods_33/small_201312121630335585.JPG" height="60" width="60"></a><b>2</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=336">【八喜系列组合烟花】五福临门、六六大顺、七星高照、八方得利</a></div>
<div class="price">&yen;180.00</div>
</div>
</li>
<li >
<div class="pic"><a href="index.php&#63;app=goods&id=375"><img alt="【五福系列组合烟花】福运长流、福满人间、福寿满堂、福如东海、福到财来" src="data/files/store_927/goods_193/small_201312130956337166.JPG" height="60" width="60"></a><b>3</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=375">【五福系列组合烟花】福运长流、福满人间、福寿满堂、福如东海、福到财来</a></div>
<div class="price">&yen;260.00</div>
</div>
</li>
<li style="border-color:#fff;" >
<div class="pic"><a href="index.php&#63;app=goods&id=399"><img alt="合家欢乐组合烟花\小礼花" src="data/files/store_927/goods_197/small_201312131059578989.JPG" height="60" width="60"></a><b>4</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=399">合家欢乐组合烟花\小礼花</a></div>
<div class="price">&yen;480.00</div>
</div>
</li>
</ul>
<ul class="box box2" id="box2_1476271702" style="display:none;">
<li >
<div class="pic"><a href="index.php&#63;app=goods&id=310"><img alt="套餐烟花-儿孙满堂" src="data/files/store_927/goods_92/small_201312121508128170.jpg" height="60" width="60"></a> <b>1</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=310">套餐烟花-儿孙满堂</a></div>
<div class="price">&yen;888.00</div>
</div>
</li>
<li >
<div class="pic"><a href="index.php&#63;app=goods&id=305"><img alt="套餐烟花-六六大顺" src="data/files/store_927/goods_136/small_201312121455369033.jpg" height="60" width="60"></a> <b>2</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=305">套餐烟花-六六大顺</a></div>
<div class="price">&yen;666.00</div>
</div>
</li>
<li >
<div class="pic"><a href="index.php&#63;app=goods&id=303"><img alt="套餐烟花-一路顺发" src="data/files/store_927/goods_118/small_201312121451582290.jpg" height="60" width="60"></a> <b>3</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=303">套餐烟花-一路顺发</a></div>
<div class="price">&yen;1,688.00</div>
</div>
</li>
<li style="border-color:#fff;" >
<div class="pic"><a href="index.php&#63;app=goods&id=300"><img alt="套餐烟花-喜事连连" src="data/files/store_927/goods_14/small_201312121443346243.jpg" height="60" width="60"></a> <b>4</b></div>
<div class="info">
<div class="title"><a href="index.php&#63;app=goods&id=300">套餐烟花-喜事连连</a></div>
<div class="price">&yen;1,288.00</div>
</div>
</li>
</ul>
</div>
</div>
</div>


后端处理

//ajax
function ajaxBigImage()
{

if(!empty($_POST['goods_id'])){
$goods_id=$_POST['goods_id'];

$goodsimg_mod = & m('goodsimage');
$uploadedfile_mod = & m('uploadedfile');
//$file_id = $goodsimg_mod->getOne("select file_id from `ecm_goods_image` WHERE goods_id={$goods_id} ORDER BY file_id DESC");

//获取file_id 字符串
$file_arr = $goodsimg_mod->getCol("select file_id from `ecm_goods_image` WHERE goods_id={$goods_id} ORDER BY file_id DESC");
if(!empty($file_arr)){
$file_str = implode(",",$file_arr);
}
//echo $file_str;

$url_arr = $uploadedfile_mod->getAll("select file_type,file_path from `ecm_uploaded_file` WHERE file_id IN({$file_str}) ORDER BY add_time DESC");

if(!empty($url_arr)){
foreach ($url_arr as $v){
if($v['file_type'] == 'image/gif'){
$url = $v['file_path'];
break;
exit();
}else {
unset($v);
}
}
}

//$url = $uploadedfile_mod->getOne("select file_path from `ecm_uploaded_file` WHERE file_id={$file_id} ORDER BY add_time DESC");

if(!empty($url)){
echo $url;
exit();
}else{
echo 0;
exit();
}
}else{
echo 0;
}
}