// OLD

javascript: var classes = this.className.split(' '); classes[classes.length-1] = 'over'; this.className = classes.join(' ');

// NEW

<style type="text/javascript">
function btnSetEvent(class, event)
{
	var classes = class.split(' ')
	classes[classes.length-1] = event
	return classes.join(' ')
}
</style>


<input ... onmouseover= "javascript: this.className = setBtnEvent(this.className, 'over');" >