function iImages() {
	var c,f,e,n,d=document.getElementsByTagName('IMG'),html='';
	
	for(i=0;i<d.length;i++) {
		c=d[i].className;
		if (c.substr(c.length-8)=='rollover') {
		  
			f=d[i].src;
			e=f.substr(f.lastIndexOf('.'));
			f=f.substr(0,f.lastIndexOf('.'));
			f=f.substr(0,f.length-2);
			d[i].iImageSrc1=d[i].src;
			d[i].iImageSrc2=f+'_2'+e;
			html+='<img src="'+d[i].iImageSrc2+'">';
			html+='<img src="'+d[i].iImageSrc1+'">';
			if (d[i].addEventListener) {
				d[i].addEventListener("mouseover",iImageOver, false);
				d[i].addEventListener("mouseout",iImageOut, false);
			} else {
				d[i].onmouseover=iImageOver;
				d[i].onmouseout=iImageOut;
			}
		}
	}
	if (html!='')
		document.write('<div style="position:absolute;left:0px;top:0px;visibility:hidden">'+html+'</div>');
}
function iImageOver() {
	this.src=this.iImageSrc2;
}
function iImageOut() {
	this.src=this.iImageSrc1;
}
function iSubmit(form) {
  document.forms[form].submit();
}
iImages();<!-- 
 -->