function rollOver(mode,object){
	var dirImages="img/";
	var extImages=".png";
	
		if(mode){
			document.images[object.id].src=dirImages+object.id+"_on"+extImages;
			document.images[eval("'"+object.id+"tri'")].src=dirImages+object.id+"tri_on"+extImages;
		}else{
			document.images[object.id].src=dirImages+object.id+"_off"+extImages;
			document.images[eval("'"+object.id+"tri'")].src=dirImages+object.id+"tri_off"+extImages;
		}
}