为什么实现不能更换图片的功能？
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1<html>
2<head>
3<title>菜单</title>
4<script language="JAVASCRIPT" type="TEXT/JAVASCRIPT">
5if(document.images){
6
7flyOff=new Image
8tankOff=new Image
9
10
11flyOff.src="images/banner4.gif"
12tankOff.src="images/banner5.gif"
13
14}
15
16function chgImg(imgField,newImg){
17if(document.images){
18ducument[imgField].src=eval(newImg+".src")
19}
20}
21</script>
22</head>
23<body>
24<a href="123.html" onmouseout="chgImg('flyImg','tankOff')" onmouseover="chgImg('flyImg','flyOff')"><img name="flyImg" src="images/banner1.gif"/></a>
25</body>
26</html>
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把img的name改为id
1<img id="flyImg" src="images/banner1.gif"/>
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ducument[imgField].src=eval(newImg+".src")
改成document[imgField].src=eval(newImg+".src")
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document写错了
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1<html>
2<head>
3<title>菜单</title>
4<script language="JAVASCRIPT" type="TEXT/JAVASCRIPT">
5if(document.images){
6
7flyOff=new Image
8tankOff=new Image
9
10
11flyOff.src="http://expert.csdn.net/images/csdn.gif"
12tankOff.src="http://expert.csdn.net/images/jspd_wdzx_sqgg_ad.gif"
13
14}
15
16function chgImg(imgField,newImg){
17if(document.images)
18{
19eval(imgField).src=eval(newImg).src
20}
21}
22</script>
23</head>
24<body>
25<a href="123.html" onmouseout="chgImg('flyImg','tankOff')" onmouseover="chgImg('flyImg','flyOff')"><img name="flyImg" src="http://expert.csdn.net/images/jspd_wdzx_sqgg_ad.gif"/></a>
26</body>
27</html>
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document[imgField].src=eval(newImg+".src")
改为
eval(imgFiled).src=eval(newImg).src
试试
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ducument[imgField].src=eval(newImg+".src")
改成
document[imgField].src=eval(newImg+".src")