Validation Error... NET-enabling start-tag requires SHORTTAG YES

Not sure what this means or how to fix it. I got this page down to 2 major errors, but this one I am stumped on. Any direction would be greatly appreciated! (We did not design/build this site, we were hired to tidy it up a bit and this was the first step)
[I]
Line 266, Column 61: NET-enabling start-tag requires SHORTTAG YES

			<form name=frmMain method=post action=companyinformation/DealerLookup.asp>

:email:

The sequence <FOO /> can be interpreted in at least two different ways, depending on the DOCTYPE of the document. For HTML 4.01 Strict, the ‘/’ terminates the tag <FOO (with an implied ‘>’). However, since many browsers don’t interpret it this way, even in the presence of an HTML 4.01 Strict DOCTYPE, it is best to avoid it completely in pure HTML documents and reserve its use solely for those written in XHTML.[/I]

[Invalid] Markup Validation of http://winchester.linkstaging.com/index.asp - W3C Markup Validator

You are missing a closing DIV and some invalid px units in markup and some unescaped ampersands and a duplicated ‘style’ attribute in another DIV. Thus leading to a cascade of ‘error reports’ showing where they might not actually be. :wink:

So remove the duplicate style kill the faulty px in the markup, e.g. height=“…” remember no ‘px’ in HTML units only CSS. Add the DIV so things nest and then you’ll probably be able to see where other errors are ‘actually’ occurring.