var prevNav=null;
function nav(num, sign)
{
	var navimg = document.getElementById('navimg_' + num);
	var navline = document.getElementById('navline_' + num);
	var navcol = document.getElementById('navcol_' + num);

	navline.className = (sign == 1) ? 'navline2' : 'navline';
	navcol.className = (sign == 1) ? 'nav2' : 'nav';
	navimg.src = (sign == 1) ? 'img/nav_' + num + '_h.gif' : 'img/nav_' + num + '.gif';
	if (subMenuExists[num]) {
		if (sign) {			
			document.getElementById('subMenu'+num).style.display='block';
			prevNav=num;
			navcol.style.position='relative';
			document.getElementById('subMenu'+num).style.top = navcol.offsetHeight + navcol.offsetTop;			
			navcol.style.position='static';
		} else {
			if (prevNav) {
				document.getElementById('subMenu'+prevNav).style.display='none';
				prevNav=null;
			}
		}
	}
}

function lmenu(num, sign)
{
	var button = document.getElementById('button_' + num);
	
	button.src = (sign == 1) ? 'img/button_white.gif' : 'img/button_blue.gif';
}

function submenu(num, sign)
{
	var menucol = document.getElementById('menucol_' + num);
	var leftsub = document.getElementById('leftsub_' + num);
	var rightsub = document.getElementById('rightsub_' + num);

	menucol.className = (sign == 1) ? 'menucol_hover' : 'menucol';
	leftsub.className = (sign == 1) ? 'leftsub_hover' : 'leftsub';
	rightsub.className = (sign == 1) ? 'rightsub_hover' : 'rightsub'
}

function backChanger(targetBg, imgname)
{
	document.getElementById(targetBg).style.backgroundImage = 'url(img/' + imgname + '_b.jpg)';
	document.getElementById('link_p').href = "javascript:aow('img/" + imgname + "_p.jpg',',width=490,height=374')";
}


function showSubMenuW(submenuId) {
	document.getElementById(submenuId).style.display='block';
}

function hideSubMenuW(submenuId) {
	document.getElementById(submenuId).style.display='none';
}