// focus flag
var focussed = false;
// current navigational item
var currentItem;

function mainNavPop(referer, mainitem) {												
		// retrieve DOM items
		if(document.getElementById) {
			obj = document.getElementById(mainitem).style;
			state = obj.visibility;
			ref = document.getElementById(referer);
			currentItem = ref;
			if (state != "visible") {
				// close all menus
				closeAllNav();
				// bring menu to front
				document.getElementById("navigation").style.zIndex = 999;
				// make target menu visible 
				obj.visibility = "visible";
			} else if (focussed != true) {
				// make target menu invisible 
				obj.visibility = "hidden";
				ref.blur();
			}
			// recuperation time (focus/click combo)
			timer = setTimeout("resetFocussed()",300);
			return false;
		} else {
			return true;
		}
}

function closeAllNav() {
		if(document.getElementById) {
			// reset all items
			for (i in menuitem) {	
				obj2 = document.getElementById(menuitem[i]).style;
			}
			// close all menus
			for (j in submenuitem) {
				obj2 = document.getElementById(submenuitem[j]).style;
				obj2.visibility = "hidden";
			}
			// put navigation to back
			document.getElementById("navigation").style.zIndex = 0;
		} else {
			return true;
		}
}

function clickMainNav(referer, mainitem) {
		if(focussed != true) {
			return mainNavPop(referer,mainitem) 
		} else { 
			return false;
		}
}


function resetFocussed() {
		// resets focus flag
		focussed = false;
}


// event listener for closing main navigation

function checkNavClose() {
		if (focussed != true) closeAllNav()
}

// focus in form

function focusEl(el1,el2) {
		if (document.getElementById) { 
			q=document.getElementById(el1); 
			if(q.focus) { 
				q.focus(); 
			} else {
				q=document.getElementById(el2); 
				if(q.focus) q.focus(); 
			}
		}
		return true;
}