鼠標移動到圖片上，得到該圖片的大圖顯示效果
應用知識：jq的DOM操作
步驟：
1、鼠標劃入時mouseover
1）創建<div>,並設置title；刪除元素本身的title
2）將元素追加到文檔
3）爲<div>設置css，讓他顯示在鼠標位置的旁邊
2、鼠標劃出時mouseout
移除<div>-->remove()
3、也可以使用mousemove()-->設置圖片跟隨着鼠標移動
<!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>圖片提示</title>
<!-- 引入jQuery -->
<script src="../../scripts/jquery.js" type="text/javascript"></script>
<style type="text/css">
body{
margin:0;
padding:40px;
background:#fff;
font:80% Arial, Helvetica, sans-serif;
color:#555;
line-height:180%;
}
img{border:none;}
ul,li{
margin:0;
padding:0;
}
li{
list-style:none;
float:left;
display:inline;
margin-right:10px;
border:1px solid #AAAAAA;
}
/* tooltip */
#tooltip{
position:absolute;
border:1px solid #ccc;
background:#333;
padding:2px;
display:none;
color:#fff;
}
</style>
<script type="text/javascript">
//<![CDATA[
$(function(){
var x = 10;
var y = 20;
$("a.tooltip").mouseover(function(e){
this.myTitle = this.title;
this.title = "";
var imgTitle = this.myTitle? "<br/>" + this.myTitle : "";
var tooltip = "<div id='tooltip'><img src='"+ this.href +"' alt='產品預覽圖'/>"+imgTitle+"<\/div>"; //創建 div 元素
$("body").append(tooltip); //把它追加到文檔中
$("#tooltip")
.css({
"top": (e.pageY+y) + "px",
"left": (e.pageX+x) + "px"
}).show("fast"); //設置x座標和y座標，並且顯示
}).mouseout(function(){
this.title = this.myTitle;
$("#tooltip").remove(); //移除
}).mousemove(function(e){
$("#tooltip")
.css({
"top": (e.pageY+y) + "px",
"left": (e.pageX+x) + "px"
});
});
})
//]]>
</script>
</head>
<body>
<h3>有效果：</h3>
<ul>
<li><a href="images/apple_1_bigger.jpg" class="tooltip" title="蘋果 iPod"><img src="images/apple_1.jpg" alt="蘋果 iPod" /></a></li>
<li><a href="images/apple_2_bigger.jpg" class="tooltip" title="蘋果 iPod nano"><img src="images/apple_2.jpg" alt="蘋果 iPod nano"/></a></li>
<li><a href="images/apple_3_bigger.jpg" class="tooltip" title="蘋果 iPhone"><img src="images/apple_3.jpg" alt="蘋果 iPhone"/></a></li>
<li><a href="images/apple_4_bigger.jpg" class="tooltip" title="蘋果 Mac"><img src="images/apple_4.jpg" alt="蘋果 Mac"/></a></li>
</ul>
<br/><br/><br/><br/>
<br/><br/><br/><br/>
<h3>無效果：</h3>
<ul>
<li><a href="images/apple_1_bigger.jpg" title="蘋果 iPod"><img src="images/apple_1.jpg" alt="蘋果 iPod" /></a></li>
<li><a href="images/apple_2_bigger.jpg" title="蘋果 iPod nano"><img src="images/apple_2.jpg" alt="蘋果 iPod nano"/></a></li>
<li><a href="images/apple_3_bigger.jpg" title="蘋果 iPhone"><img src="images/apple_3.jpg" alt="蘋果 iPhone"/></a></li>
<li><a href="images/apple_4_bigger.jpg" title="蘋果 Mac"><img src="images/apple_4.jpg" alt="蘋果 Mac"/></a></li>
</ul>
</body>
</html>