function changeHover(menu,onoff) {
	if (onoff == 1)
	{
		document.getElementById(menu + '_image').style.display = 'none';
		document.getElementById(menu + '_image_hover').style.display = '';
	}
	else 
	{
		document.getElementById(menu + '_image').style.display = '';
		document.getElementById(menu + '_image_hover').style.display = 'none';
	}
}