jQuery实现鼠标跟随效果
所谓鼠标跟随，一般就是指鼠标移到哪张图片上，那该张图片的放大图片就会出现，并且放大图片会随着鼠标在该张图片上移动而移动。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
*{
margin:0;
padding:0;
}
img{
border:none;
}
.box{
width:660px;
position: relative;
}
.box .mark{
position: absolute;
width: 400px;
height: 300px;
display: none;
}
.box .mark img{
width: 100%;
}
.box img{
width: 150px;
float: left;
margin:5px;
}
</style>
</head>
<body>
<div class="box" id="box">
<img src="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=e95708d565639d99576ae7cb00729334"
realImg="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=5328802dc943fc046e109f70359add0a" alt=""/>
<img src="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=9e5459a7c0098c27adf4bdd73889caa9"
realImg="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=846f4d1987765dc4cfd5a06fcdd2dcc1" alt=""/>
<img src="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=3cd1c8e301007f0c94850139ac79cb5a"
realImg="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=747bf3f7092ebd2b0bf9fcd27e28bbe5" alt=""/>
<img src="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=f391169b2cf678aa6fd253cf40d9821d"
realImg="http://www.qdfuns.com/misc.php?mod=attach&genre=editor&aid=fec8d2f20fad1f28d540337a831e89d0" alt=""/>
<div id="mark" class="mark"><img src="" alt=""/></div>
</div>
<script src="http://s0.kuaizhan.com/res/skin/js/lib/jquery-2.0.3.min.js"></script>
<script>
//1.鼠标移入哪张图片的时候，让他对应的大图显示；
//2.当鼠标在img中移动的时候，大图跟着走；
var $box=$('.box');
var $aImg=$box.children('img');
var $mark=$('.mark');
var $offset=$box.offset();
$aImg.mouseover(function(){
//当鼠标移入每张图片的时候，让mark显示，并且，让mark里面的img标签，src属性值为当前这个图片的realImg属性上拿到的值；
$mark.show().find('img').attr('src',$(this).attr('realImg'));
});
$aImg.mousemove(function(e){
//拿鼠标的x坐标，减去$box距离body的left位置；
var left= e.clientX-$offset.left+10;
var top= e.clientY-$offset.top+10;
$mark.css({left:left,top:top})
});
$aImg.mouseout(function(){
$mark.hide();
})
</script>
</body>
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