function rOver(oImg) 
{
	var cSrc = oImg.src;
	var rRO  = /_ro\./;
	
  	if (!rRO.test(cSrc))
  	{
  		oImg.src = cSrc.replace(/.jpg/,"_ro.jpg");
  		oImg.src = cSrc.replace(/.gif/,"_ro.gif");
  	}
}

function rOut(oImg) 
{
	var cSrc = oImg.src;
	var rRO  = /_ro\./;
	if (rRO.test(cSrc))
	{
		oImg.src = cSrc.replace(/_ro.jpg/,".jpg");
		oImg.src = cSrc.replace(/_ro.gif/,".gif");
	}
}