function imageChange(img, src) {
	img.src = src;
}
/*
function openSubmenu(elementId, countSubelements) {
	
	closeSubmenu('submenu_1');
	closeSubmenu('submenu_2');
	closeSubmenu('submenu_3');
	
	var submenu = document.getElementById(elementId);
	submenu.style.height = (countSubelements * 21)+'px';
	submenu.style.visibility = 'visible';
}

function closeSubmenu(elementId) {
	var submenu = document.getElementById(elementId);
	submenu.style.height = '0px';
	submenu.style.visibility = 'hidden';
}
*/