上传图片上传即可见的javascript

 

    <script language="javascript">
 
    function mainChange(Value)

{
flag=false;
document.all.mainimage.width=235;
document.all.mainimage.height=150;
document.all.mainimage.alt="";
document.all.mainimage.src=Value;
}

    </script>

<asp:FileUpload ID="fileUpPhoto" runat="server" Width="237px" onchange='mainChange(this.value)'></asp:FileUpload>