In a Web form, I have a table defined as follow:

<table width="419" height="150" border="0" align="center" cellpadding="0" cellspacing="0" background="Images/LOGIN.jpg">

This login page contains a lot of HTML code inside this table. It also includes some runat server controls. The only thing needed to complete the page is to adjust the background image dynamically from the code behind. As the table tag is not a ASP.NET control, I cannot get a handle of it from the code behind. So, I thought I could replace that HTML tag with the ASP.NET table control. But, if I do it, I have to change the entire page completely as we cannot use HTML tags inside a table control. The only thing I need is to change this background image based on a specific condition. I guess I will have to do that from javascript from the client side. Any other ideas?