看看像这样的不用javascript怎么做？

[OK521]

下拉列表框ddltface中显示图像编号如：image1.gif、image2.gif等等。旁边有一<asp:image id=imgface runat=server/>控件。
下拉列表框中的图像编号也是用数据库中得到的。在后置代码中绑定得到。想用ddltface.attributes.add("onchange","...")这个方法来做，那位高后帮帮我。谢了。

[ajqc]

1,不知道你想做onChang什么,直接在ASPX文件里就能做好了.
2.你太小气了吧

解决:在你要的那个下拉框 的标签内加一个 onChang="aaa();" aaa是JSP名字,随你取
然后在</from></body>之间放一个客户端脚本块,JSP的,在里面加上aaa函数,里面就是你想下拉框改动选项时要做的工作

[saucer]

that is still javascript, if you don't want to use Javascript at all, try

<form runat="server">
<asp:DropDownList id="ddltface" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ChangeImage">
<asp:ListItem Text="csdn" Value="http://www.csdn.net/images/csdn.gif" />
<asp:ListItem Text="google" Value="http://www.google.com/images/res0.gif" />
</asp:DropDownList>

<asp:image id=imgface runat=server/>

</form>

<script language=C# runat=server>
void ChangeImage(Object o, EventArgs e)
{
imgface.ImageUrl = ddltface.SelectedItem.Value;
}
</script>

if you insist, try

<form runat="server">
<asp:DropDownList id="ddltface" runat="server">
<asp:ListItem Text="csdn" Value="http://www.csdn.net/images/csdn.gif" />
<asp:ListItem Text="google" Value="http://www.google.com/images/res0.gif" />
</asp:DropDownList>

<asp:image id=imgface runat=server/>
<asp:Button id=btn Text=Submit runat=server />
</form>

<script language=C# runat=server>

void Page_Load(Object o, EventArgs e)
{

ddltface.Attributes["onclick"] = "javascript:imgface.src=this.value;";

}
</script>

[saucer]

sorry, change "click" to "onchange"