ImageButton鼠标放到button时，改变图片
function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i <(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}


<a href= "# " onmouseout= "MM_swapImgRestore() " onmouseover= "MM_swapImage( 'Image23 ', ' ', '~/images/subway_over.gif ',1) ">

<asp:ImageButton ID= "ImageButton2 " runat= "server " ImageUrl= "~/images/subway.gif " OnClick= "ImageButton2_Click "/> </a>
</td>

怎么不行啊，客户端de可以


[解决办法]
//aspx
<asp:ImageButton ID= "ImageButton2 " runat= "server " ImageUrl= "~/images/1.gif " />

//aspx.cs

private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
ImageButton2.Attributes.Add( "onmouseover ", "this.src= 'images/2.gif ' ");
ImageButton2.Attributes.Add( "onmouseout ", "this.src= 'images/1.gif ' ");
}
}