function initSubnav(menuNr) {	
	var mainNavs = document.getElementById('mainNav').getElementsByTagName("a");	
		
	for (i=0; i<mainNavs.length; i++) {		
		if (mainNavs[i].id != menuNr) {			
			$('subNav_'+mainNavs[i].id).set('opacity', 0);							
		}else{		
			$('subNav_'+mainNavs[i].id).set('opacity', 1);	
		}
	}
}


function showSubnav(menuNr) {	
	var mainNavs = document.getElementById('mainNav').getElementsByTagName("a");
	
	for (i=0; i<mainNavs.length; i++) {		
		if (mainNavs[i].id != menuNr) {			
			$('subNav_'+mainNavs[i].id).fade(0);							
		}else{		
			$('subNav_'+mainNavs[i].id).fade(1);	
		}
	}	
}


function openMenu(parentNr, menuNr) {
	var outButton = document.getElementById('outButton');
	outButton.style.visibility = "visible";
	
	var allDivs = document.getElementsByTagName("div");	
	for (a=0; a<allDivs.length; a++) {
		if (allDivs[a].id != "slideMenu") {
			continue;
		} else {
			if (allDivs[a].parentNode.id == 'slideMenu_'+parentNr+'_'+menuNr) {
				$(allDivs[a].parentNode.id).set('tween', {duration: 200, transition: Fx.Transitions.Quad.easeInOut}).tween('height', 160);	
			} else {
				$(allDivs[a].parentNode.id).set('tween', {duration: 200, transition: Fx.Transitions.Quad.easeInOut}).tween('height', 0);	
			}						
		}		
	}
}

function closeMenus() {	
	var outButton = document.getElementById('outButton');
	outButton.style.visibility = "hidden";	
	
	var allDivs = document.getElementsByTagName("div");	
	for (a=0; a<allDivs.length; a++) {
		if (allDivs[a].id != "slideMenu") {
			continue;
		} else {
			$(allDivs[a].parentNode.id).set('tween', {duration: 200, transition: Fx.Transitions.Quad.easeInOut}).tween('height', 0);								
		}		
	}
}