jQuery实现鼠标划过展示大图的方法

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

代码如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<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。