How to use onmouseover onmouseclick in Firefox

Question

This code displays a picture - then onclick enlarges the picture - this works okay in IE
<pre><nowiki><style>
<!-- ONCLICK - PIX SIZE -->
.OnClick {height: 100%;}
</style>
<img onclick='className="OnClick"' src="FullPathToPicture" title="CLICK TO ENLARGE PIX"></nowiki></pre>
Why doesn't that code work in Firefox?

Answer 1

FIREFOX DIDN'T POST COMPLETE CODE
HERE'S CODE AGAIN - WITHOUT BRACKETS
style
.OnClick {height: 100%;}
/style
img onclick='className="OnClick"' src="FullPathToPicture" title="CLICK TO ENLARGE PIX"
Why doesn't that code work in Firefox?