本文实例讲述了jQuery实现鼠标划过展示大图的方法。分享给大家供大家参考。具体如下：
这里用css和jquery实现鼠标移上元素时大图展示，并且大图不能溢出整个div框
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery鼠标划过展示大图</title>
<style type="text/css">
* { margin:0; padding:0; }
body { font:12px/1.5 tahoma, arial, simsun; }
.wrap { position:relative; margin:0 auto; width:319px; height:243px; }
table { border-collapse:collapse; border-spacing:0; }
td { border:1px solid #ccc; background:#f0f0f0; width:80px; height:80px; }
td div { position:relative; width:100%; height:100%; background:#eee; }
td b { display:block; position:relative; z-index:20; width:20px; height:20px; background:#fff; }
td a.s { display:block; position:absolute; z-index:10; left:0; top:0; height:100%; width:100%; text-indent:-999em; overflow:hidden; background:url(Images/nb/8080logo.jpg) no-repeat; }
#hideBox { display:none; position:absolute; width:140px; height:120px; background:#fff; border:1px solid #333; z-index:300; }
#hideBox a { display:block; height:100%; width:100%; }
</style>
<script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var wrapWidth = $(".wrap").width();
var wrapHeight = $(".wrap").height();
var boxWidth = $("#hideBox").outerWidth();
var boxHeight = $("#hideBox").outerHeight();
$("td a").mouseover(function(){
var pos = $(this).parent("div").position();
var toLeft = wrapWidth - (boxWidth + pos.left);
var toTop = wrapHeight - (boxHeight + pos.top);
if(toLeft>0){
$("#hideBox").css({left:pos.left});
}
else if(toLeft<0){
$("#hideBox").css({left:wrapWidth-boxWidth});
}
if(toTop>0){
$("#hideBox").css({top:pos.top});
}
else if(toTop<0){
$("#hideBox").css({top:wrapHeight-boxHeight});
}
$("#hideBox").show();
});
$("#hideBox").mouseout(function(){
$(this).hide();
});
});
</script>
</head>
<body>
<div class="wrap">
<table>
<tr>
<td><div><b>15</b><a id="g1" class="s" href="#">名称1</a></div></td>
<td><div><b>16</b><a id="g2" href="#">名称2</a><br />
<a id="g3" href="#">名称3</a></div></td>
<td><div><b>15</b><a id="g3" class="s" href="#">名称1</a></div></td>
<td><div><b>15</b><a id="g4" class="s" href="#">名称1</a></div></td>
</tr>
<tr>
<td><div><b>15</b><a id="g5" class="s" href="#">名称1</a></div></td>
<td><div><b>15</b><a id="g6" class="s" href="#">名称1</a></div></td>
<td><div><b>16</b><a id="g7" href="#">名称2</a><br />
<a id="g8" href="#">名称3</a></div></td>
<td><div><b>16</b><a id="g9" href="#">名称2</a><br />
<a id="g3" href="#">名称3</a></div></td>
</tr>
<tr>
<td><div><b>16</b><a id="g11" href="#">名称2</a><br />
<a id="g12" href="#">名称3</a></div></td>
<td><div><b>16</b><a id="g13" href="#">名称2</a><br />
<a id="g14" href="#">名称3</a></div></td>
<td><div><b>15</b><a id="g15" class="s" href="#">名称1</a></div></td>
<td><div><b>15</b><a id="g16" class="s" href="#">名称1</a></div></td>
</tr>
</table>
<div id="hideBox"><a href="">大图展示</a></div>
</div>
</body>
</html>
希望本文所述对大家的jQuery程序设计有所帮助。