var last_id = false;
var last_image = false;

function titlemenu( link, source, source_over ) {

	if ( last_id ) {
		document.getElementById( last_id ).src = last_image;
	}
	last_image = source;
	last_id = link;
	document.getElementById( link ).src = source_over;
}

function menuout ( link, sourceout )  {
	if ( last_id != link ) {
		document.getElementById( link ).src = sourceout;
	}
}