So the API for document.getElementById in Internet Explorer 7 and prior returns for and ID or a name.  Meaning

<input type="text" value="1" name="iesucks" />

<script>alert(document.getElementById('iesucks');</script>


alerts a value of '1' no problem.  Oh, and guess what, it's not case sensitive either!


Hooray, so then that means if you have, oh say, a META tag like so

<meta name="Description" content="The ultimate IE Sucks blog" />


and an input box such as

<input type="text" id="description" value="IE SUCKS!" />


suddenly document.getElementById('description').value returns 'undefined' because it's looking for a value attribute in the META tag.  Brilliant, IE devs, damned brilliant.