A SELECT tag is what a DropDowList in Asp.Net renders to in HTML and it's a standard web control.
If you ever had to pop up a DIV over it (a menu in most cases) then you know that in IE6 and below and FireFox 1.x
the select tag showed over the div tag. This was/is annoying as hell.
There was a hack for this by putting an IFrame into a DIV but this introduced problems with linking etc...
Now FINALLY this is fixed in IE7 and FireFox 2.x.
I'm glad! Aren't you? :)