Onload the script adds an anchor and hides the submit button.
When the anchor is pressed it "clicks" the submit button so 
that the form gets sent.

Includes versions for jQuery, Mootools as well as a normal 
javascript version. Also included an example when using 
image replacement. download the files here

Before:
	<input class="replacesubmit" type="submit" value="Submit"/>
After:
	<a href="#" class="replacesubmit"><em></em>Submit</a>
	<input type="submit" class="replacesubmit" value="Submit" style="display:none"/>

form 1

form 2

form 3