function rollover(element)
	{
	var src=element.getAttribute('src');
	
	var nomimage=src.substring(src.lastIndexOf("/")+1,src.length);
	var url=src.substring(0,src.lastIndexOf("/")+1);
	
	var extension=nomimage.substring(nomimage.indexOf("."),nomimage.length);
	var nomimage=nomimage.substring(0,nomimage.indexOf("."));
	
	var clicked="-clic";
	
	if(nomimage.substr(nomimage.length-clicked.length)==clicked){
		nomimage=nomimage.substr(0,nomimage.length-clicked.length);
		var dejaroll=nomimage.substring(nomimage.length-5-clicked.length);
	}else{
		var dejaroll=nomimage.substring(nomimage.length-5);
	}
	if (dejaroll =='-roll')
		{
		var src2=element.setAttribute("src",url+nomimage.substring(0,nomimage.length-5)+extension);
		}
	else 
		{
		var src2=element.setAttribute("src",url+nomimage+"-roll"+extension);
		}
	}