怎样通过onMouseOver去更改表格单元格的背景图?????

Question

onmousemove="if (表格id.style.background=='a.gif'){ 
表格id.style.background='b.gif';else 表格id.style.background='a.gif'}"

Answer 1

更正onmousermove 为onmouseover

Answer 2

onmousemove="表格id.style.background='b.gif';“
onmouseout = "id.style.background='a.gif';"

Answer 3

<style>
.pic1{background:url(http://expert.csdn.net/images/csdn.gif)}
.pic2{background:url(http://www.csdn.net/images/ad/vsnet_120.gif)}
</style>
<table width=100 height=100 border=1>
<tr>
<td onmouseover="this.className='pic2'" onmouseout="this.className='pic1'" class="pic1">&nbsp;</td>
</tr>
</table>

Answer 4

to bencalie(Bencalie)
你的方法很不错:)
但鼠标的移动，游览器每次都会去网站上下载该背景图，显得很慢。

Answer 5

用图片数组
然后调用就调用数组内容
以上是类似写法ImageArray=["loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif","loads.gif","up_d.gif","down_d.gif","down_o.gif","up_o.gif"];
function preLoad(path,obj){
for(i=0;i<=obj.length;i++){
this[i]=new Image(); 
this[i].src=path+obj[i];
}
return this;
}
preb=new preLoad("image/",ImageArray);

Answer 6

我现在已经预先加载了那几张背景图，可是每次触发onmouseover，onmouseout事件，背景还是要重新下载一遍？？？？？为什么呀！！！！
效果如下：
http://www.21cantonfair.com/newgb/zdzn/index.asp