var activeMenu = 0;
var oldActiveMenu = 0;

function changeImages(menu, image){
	//document[menu].src = image;
}
function NS4resize() {
	if (NS4sIW != window.innerWidth || NS4sIH != window.innerHeight) window.location.reload();
}
function getExplorerVersion() {
	var ieVers = parseFloat(navigator.appVersion);
	if( navigator.appName != 'Microsoft Internet Explorer' ) return ieVers;
	var tempVers = navigator.appVersion;
	var i = tempVers.indexOf( 'MSIE ' );
	if( i >= 0 ) {
		tempVers = tempVers.substring( i+5 );
		ieVers = parseFloat( tempVers ); 
	}
	return ieVers;
}
function getAbsoluteLeft(prmElement){
	var x = 0;
	while(prmElement){
		x += prmElement.offsetLeft;
		if (prmElement.offsetParent){
			prmElement = prmElement.offsetParent;
		}
		else {
			prmElement = null;
		}
	}
	return x;
}
function getAbsoluteTop(prmElement){
	var y = 0;
	while(prmElement){
		y += prmElement.offsetTop;
		if (prmElement.offsetParent){
			prmElement = prmElement.offsetParent;
		}
		else {
			prmElement = null;
		}
	}
	return y;
}
function showMenu(prmMenuID){
	var tmpLeft;
	var tmpTop;
	var offsetLeft = 0;
	var offsetTop = 23;
	activeMenu = prmMenuID;
	if (oldActiveMenu != 0 && oldActiveMenu != activeMenu){
		hideMenu3(oldActiveMenu);
	}
	if (prmMenuID.substring(0, 3) == "top"){
		offsetTop = 18;
	}
	hideSelect();
	tmpLeft = getAbsoluteLeft(document.getElementById("mainnav" + prmMenuID));
	tmpTop = getAbsoluteTop(document.getElementById("mainnav" + prmMenuID));
	document.getElementById("menu_" + prmMenuID).style.left = tmpLeft + offsetLeft;
	document.getElementById("menu_" + prmMenuID).style.top = tmpTop + offsetTop;
	document.getElementById("menu_" + prmMenuID).style.visibility = "visible";
	
	oldActiveMenu = activeMenu;
}
function hideMenu(prmMenuID){
	var tmp = setTimeout("hideMenu2('" + prmMenuID + "')", 300);
	activeMenu = 0;
}
function hideMenu2(prmMenuID){
	if (activeMenu != prmMenuID){
		if (activeMenu == 0){
			showSelect();
		}
		document.getElementById("menu_" + prmMenuID).style.visibility = "hidden";
	}
}
function hideMenu3(prmMenuID){
	document.getElementById("menu_" + prmMenuID).style.visibility = "hidden";
}
function showSelect() {
	var i;
	var sel = document.getElementsByTagName("SELECT");   
	  
		for (i = 0; i < sel.length; i++)
		{ 
			sel[i].style.visibility = 'visible'; 
		}
	
}
function hideSelect() {
	var i;
	var sel = document.getElementsByTagName("SELECT");     
	for (i = 0; i < sel.length; i++) 
	{ 
		sel[i].style.visibility = 'hidden'; 
	}
}