function hover_link(link_number)
{	
	document.getElementById('menuitem_inner' + link_number).className = 'menuitem_inner_over';
	document.getElementById('menuitem_left' + link_number).className = 'menuitem_left_over';
	document.getElementById('menuitem_right' + link_number).className = 'menuitem_right_over';
}

function unhover_link(link_number)
{
	document.getElementById('menuitem_inner' + link_number).className = 'menuitem_inner';
	document.getElementById('menuitem_left' + link_number).className = 'menuitem_left';
	document.getElementById('menuitem_right' + link_number).className = 'menuitem_right';
}