javascript - IE JavaScript error onclick

Question

I'm relatively inexperienced in JavaScript, so this one is throwing me. Any idea why this simple JavaScript would throw a Syntax error in IE?

<span class='floatleft' style='width:50px;'>
<a href='/Pages/ADI_Store.php?' 
class='hiddenlink' style='border:1px solid silver; width:100%;'
onclick="alert('Test')" >
<div class='floatleft'>Blue</div></a>
</span>

(Class 'hiddenlink' just hides the underscore, 'floatleft' floats the div left.)