var debug = false;
var viewportWidth = 0;
var viewportHeight = 0;
var scrollOffsetX = 0;
var scrollOffsetY = 0;
var menuEvents = new Array();
var MOUSE_OVER_DELAY = 50;
var MOUSE_OUT_DELAY = 300;
var menuItems = new Array();
var iFrameHackEnabled = false;


function MenuItem(itemId) {
	this.id = itemId;
	this.event = 0;
}

Array.prototype.getMenuItemById = getMenuItemById2

function getMenuItemById2(someId) {
	for (var i=0; i < menuItems.length; i++) {
		if (menuItems[i].id == someId) {
			return menuItems[i];
		}
	}
	return null;
}

function activateMenu(nav) {
	var navroot = document.getElementById(nav);
	if(navroot==null) return;
	
	var lis = navroot.getElementsByTagName('LI');
	var menuNo = 1;
	for (var i=0; i<lis.length; i++) {
		var children = lis[i].getElementsByTagName('UL');
		var child = children[0];
		if(child && child.tagName == 'UL') {
			lis[i].className += ' hasSubmenus';
			lis[i].id =  nav + '_' + menuNo++;
			var menuItem = new MenuItem(lis[i].id);
			menuItems = menuItems.concat(menuItem);
			if (nav=='primeMenuTop') {
				lis[i].onmouseover = function() {
					var eventIndex = getMenuLevel(this) * 2 - 1;
					var menuItem = menuItems.getMenuItemById(this.id);
					if (menuItem) {
						clearTimeout(menuItem.event);
					}
					if (menuEvents[eventIndex]) {
						clearTimeout(menuEvents[eventIndex]);
					}
					menuItem.event = setTimeout('mouseOverTopMenu(\''+this.id+'\')', MOUSE_OVER_DELAY);
					menuEvents[eventIndex] = menuItem.event;
					return true;
				}
			} else {
				lis[i].onmouseover = function() {
					var eventIndex = getMenuLevel(this) * 2 - 1;
					var menuItem = menuItems.getMenuItemById(this.id);
					if (menuItem) {
						clearTimeout(menuItem.event);
					}
					menuItem.event = setTimeout('mouseOverMenu(\''+this.id+'\')', MOUSE_OVER_DELAY);
					menuEvents[eventIndex] = menuItem.event;
					return true;
				}
			}
			lis[i].onmouseout = function() {
				var eventIndex = getMenuLevel(this) * 2;
				var menuItem = menuItems.getMenuItemById(this.id);
				if (menuItem) {
					clearTimeout(menuItem.event);
				}
				menuItem.event = setTimeout('mouseOutMenu(\''+this.id+'\')', MOUSE_OUT_DELAY);
				menuEvents[eventIndex] = menuItem.event;
				return true;
			}
		}
	}
}

function mouseOverTopMenu(someElementId) {
	window.focus();
//	document.forms['search'].Search.focus();
	var someElement = document.getElementById(someElementId);
	var subMenuUL = someElement.getElementsByTagName('UL')[0];
	measureScrollOffset();

	subMenuUL.style.display='block';
	var parentElement = subMenuUL.parentNode;
	if (parentElement.parentNode.id == 'primeMenuTop') { // Main menu item in the top menu.
		var layerLeft = parentElement.offsetLeft;
		var layerWidth = getElementWidth(subMenuUL);
		var difference = viewportWidth-layerLeft-layerWidth+scrollOffsetY;
		var leftSide = getAbsolutePositionLeft(parentElement);
		subMenuUL.style.left = leftSide+'px';
		subMenuUL.style.top = getAbsolutePositionTop(parentElement)+getElementHeight(parentElement)+'px';
	} else {
		subMenuUL.style.left = '150px';
		if (document.all && subMenuUL.currentStyle) { // MSIE only
			subMenuUL.style.top = parentElement.offsetTop-1+'px';
		} else {
			subMenuUL.style.top = parentElement.offsetTop-2+'px';
		}
	}
	if (iFrameHackEnabled) {
		displayIFrameHack(subMenuUL);
	}
}

function mouseOverMenu(someElementId) {
	window.focus();
	//document.forms['search'].Search.focus();
	var someElement = document.getElementById(someElementId);
	var subMenuUL = someElement.getElementsByTagName('UL')[0];
	measureScrollOffset();

	subMenuUL.style.display='block';
	var layerTop=getAbsolutePositionTop(subMenuUL);
	var layerHeight=getElementHeight(subMenuUL);
	var difference=viewportHeight-layerTop-layerHeight+scrollOffsetY;
	if(difference < 0) {
		if(difference <= -(layerTop+scrollOffsetY)) {
			subMenuUL.style.top=layerTop-scrollOffsetY-2+'px';
		} else {
			subMenuUL.style.top=difference-2+'px';
		}
	}
	if (iFrameHackEnabled) {
		displayIFrameHack(subMenuUL);
	}
}

function mouseOutMenu(someElementId) {
	var someElement = document.getElementById(someElementId);
	var subMenuUL = someElement.getElementsByTagName('UL')[0];
	var ml = getMenuLevel(subMenuUL);
	var allChildMenus = subMenuUL.getElementsByTagName('UL');
	var iFrameHack;

	for (var i=0; i < allChildMenus.length; i++) {
		allChildMenus[i].style.display='none';
		if (iFrameHackEnabled) {
			iFrameHack = document.getElementById('iFrameHack'+getMenuLevel(allChildMenus[i]));
			if (iFrameHack != null) {
				iFrameHack.style.display = 'none';
			}
		}
	}
	iFrameHack = document.getElementById('iFrameHack'+getMenuLevel(subMenuUL));
	if (iFrameHack != null) {
		iFrameHack.style.display = 'none';
	}

	subMenuUL.style.display='none';
	var eventIndex = ml * 2;
	menuEvents[eventIndex] = 0;
}

function getMenuLevel(someElement) {
	var level;
	if (someElement.tagName && someElement.tagName=='UL') level = 1;
	else level = 0;
	if (someElement.parentNode)
		level += getMenuLevel(someElement.parentNode);
	return level;
}

function getElementHeight(someElement) {
	if(someElement.offsetHeight) {
		//Non-IE
		return someElement.offsetHeight;
	} else if(someElement.clientHeight) {
		//IE 6+ in 'standards compliant mode'
		return someElement.clientHeight;
	}
}


function displayIFrameHack(someElement) {
	var iFrameHack = document.getElementById('iFrameHack'+getMenuLevel(someElement));
	hideAllComboBoxes();
	return;

	if (iFrameHack != null) {
		iFrameHack.style.top = getAbsolutePositionTop(someElement)+2+'px';
		iFrameHack.style.left = getAbsolutePositionLeft(someElement)+2+'px';
		iFrameHack.style.width = someElement.offsetWidth+'px';
		iFrameHack.style.height = someElement.offsetHeight+'px';
		iFrameHack.style.zIndex = 19;
		iFrameHack.style.display = 'block';
	}
}


function getAbsolutePositionLeft(someElement) {
	var ofs = someElement.offsetLeft;
	if (someElement.offsetParent) ofs += getAbsolutePositionLeft(someElement.offsetParent);
	return ofs;
}

function getElementWidth(someElement) {
	if(someElement.offsetWidth) {
		//Non-IE
		return someElement.offsetWidth;
	} else if(someElement.clientWidth) {
		//IE 6+ in 'standards compliant mode'
		return someElement.clientWidth;
	}
}

function getAbsolutePositionTop(someElement) {
	var ofs = someElement.offsetTop;
	if (someElement.offsetParent) ofs += getAbsolutePositionTop(someElement.offsetParent);
	return ofs;
}

function getRelativePositionTop(someElement) {
	var ofs;
	if (someElement.parentNode) ofs = someElement.parentNode.offsetTop
	else ofs = 0;
	return ofs;
}

function getRelativePositionLeft(someElement) {
	var ofs;
	if (someElement.parentNode) ofs = someElement.parentNode.offsetLeft
	else ofs = 0;
	return ofs;
}

function measureScrollOffset() {
	if (self.pageYOffset) {
		// all except Explorer
		scrollOffsetX = self.pageXOffset;
		scrollOffsetY = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop) {
		// Explorer 6 Strict
		scrollOffsetX = document.documentElement.scrollLeft;
		scrollOffsetY = document.documentElement.scrollTop;
	} else if (document.body) {
		// all other Explorers
		scrollOffsetX = document.body.scrollLeft;
		scrollOffsetY = document.body.scrollTop;
	}
}

function measureViewportSize() {
	if( typeof(window.innerWidth) == 'number' ) {
		//Non-IE
		viewportWidth = window.innerWidth;
		viewportHeight = window.innerHeight;
	} else if(document.documentElement && document.documentElement.clientHeight) {
		//IE 6+ in 'standards compliant mode'
		viewportWidth = document.documentElement.clientWidth;
		viewportHeight = document.documentElement.clientHeight;
	} else if(document.body && document.body.clientHeight) {
		//IE 4 compatible
		viewportWidth = document.body.clientWidth;
		viewportHeight = document.body.clientHeight;
	}
}

function createIFrame(id) {
	var elementIFrame = document.createElement('iframe');
	elementIFrame.id = id;
	elementIFrame.setAttribute('src', 'about:blank');
	elementIFrame.setAttribute('scrolling', 'no');
	elementIFrame.setAttribute('frameBorder', '0');
	document.getElementsByTagName('body')[0].appendChild(elementIFrame);
	elementIFrame.style.display='none';
	elementIFrame.style.position='absolute';
	elementIFrame.style.top='0px';
	elementIFrame.style.left='0px';
	iFrameHackEnabled = true;
}

function initMenus() {
//	if (false && navigator.userAgent.indexOf('MSIE') > -1) {
	if ( navigator.userAgent.indexOf('MSIE') > -1) {
		for (var i=2; i<6; i++)
			createIFrame('iFrameHack'+i);
	}
	measureViewportSize();
	activateMenu('primeMenuTop');
	activateMenu('primeMenu1');
	activateMenu('primeMenu2');
	activateMenu('primeMenu3');
	

}

window.onresize=measureViewportSize;