This probably sounds like a very silly question, but I am having trouble with controls appearing in front of other controls at runtime.

On each of the content pages, it is a Drop Down List Box that is located at the top of the page that is the problem. I have a master page with a menu on it and when the menu is hovered over it pops up as expected but part of it will go under the drop down list box located on the content section of the page. The same problem occurs when a ajax request is processed, a semi transparent div appears to cover the screen, but again the drop down list is on top of the div. It is the case on several pages and is always a Drop Down List, I just can't get it sent to the back.

I have done the obvious and sent the control to the back using the button on the toolbar but this appears to do nothing.

Any suggestions?

This is a known bug in the way the <select> tag gets rendered by the browser.  Currently, the <select> is rendered by Windows and not by the browser.  As such, it gets rendered on top of everything all the time regardless of z-order, HTML rendering order, etc.

Your hack options that I'm aware of are to hide the dropdown when the menu renders or to position an iframe under the menu and over the dropdown

Hhhmmm... Not too good that..

Is this the case with any other controls?

Does anyone else know of a better work around?

If you use the CSS Friendly Control Adapters there is a workaround implemented that overlays controls like the dropdown control with an invisible IFRAME.

That makes the menu divs appear on top of the controls that always was forced to the top in IE6.

Best regards,
Per Salmi

Thanks for the info and link, much appreciated!

I am however still a bit of a newbie, and I am pressed for time on this project. I also have no exprience with CSS either, which may prove a problem when using those extenders. It's all very annoying really especailly as I only need a menu and a div to stay on top. I'll keep looking and hope someone else knows another alternative fix, I think.

Thanks again

I have noticed this same behavior in IE 6 but not in IE 7