function RollOver(img) {
	var obj = document.getElementById(img);
	
	obj.src = 'http://ctm-argentina.com.ar/images/navmenu/' + img + '_on.jpg';
}

function RollOut(img) {
	var obj = document.getElementById(img);
	
	obj.src = 'http://ctm-argentina.com.ar/images/navmenu/' + img + '_off.jpg';
}