鼠标悬浮停留三秒后自动显示大图js代码

<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", "");
this.t = this.title;
this.title = " ";
var c = (this.t != "") "<br/>" + this.t : " ";

$.post("index.php", {goods_id: goods_id},function(data){
$.ajaxSettings.async = false;
if(data!=0){
urll = data;

$("body").append("<div id='preview'><img src="/UploadFiles/2021-04-02/+ urll +">