function cmsMenu() {
	this.menuOpen = false;
	this.currHead = null;
	this.timer = null;
	this.menuIds = new Array();
}

cmsMenu.prototype.addMenu = function(id) {
	this.menuIds.push(id);
}

cmsMenu.prototype.highlightSub = function(menuId, lineNum) {
	for (x = 0 ; true ; x++) {
		obj = cmsFindObj(menuId+"_sub"+x);
		if (! obj) break;
		obj.className = "cmsMenu_up cmsMenu_up_" + menuId;
	}
	
	if (lineNum != null) {
		cmsFindObj(menuId+"_sub"+lineNum).className = "cmsMenu_over cmsMenu_over_" + menuId;
	}

	if (this.menuTimer) clearTimeout(this.menuTimer);
}

// Change color of menu items when the mouse hovers over.  
cmsMenu.prototype.highlightMain = function(headId, menuId, state) {
	//Hide all the menus
	this.hideAll(headId);
	this.currHead = headId;

	var topOver = cmsFindObj(menuId+"_topOver");
	if (topOver) {
		var topUp = cmsFindObj(menuId+"_topUp");
		topOver.style.display = "";
		topUp.style.display = "none";
	}
}

cmsMenu.prototype.highlightNoPop = function(headId, menuId) {
	//Hide all the menus
	this.hideAll(headId, menuId);
	this.highlightMain(headId, menuId, 'over')
	if (this.menuTimer) clearTimeout(this.menuTimer);
}

// Find positioning for sub menus
cmsMenu.prototype.getLeftOffset = function(headId, offsetHorizontal) {
	var obj = cmsFindObj(headId);
	var ret = obj.offsetLeft;
	if (offsetHorizontal >= 0) ret += offsetHorizontal;
	else ret += (obj.offsetWidth - 1);
	while(obj.offsetParent != null) {   
		oPar = obj.offsetParent;
		ret += oPar.offsetLeft;
		obj = oPar;
	}
	
	return ret;
}

// Find positioning for sub menus
cmsMenu.prototype.getTopOffset = function(headId, offsetVertical) {
	var obj = cmsFindObj(headId);
	var ret = obj.offsetTop;
	if (offsetVertical >= 0) ret += offsetVertical;
	else ret += (obj.offsetHeight - 1);
	while(obj.offsetParent != null) {
		oPar = obj.offsetParent;
		ret += oPar.offsetTop;
		obj = oPar;
	}
	return ret;
}

// Show sub menus
cmsMenu.prototype.popDown = function(headId, menuId, offsetHorizontal, offsetVertical) {
	if (this.menuTimer) clearTimeout(this.menuTimer);
	var menuObj = cmsFindObj(menuId+"_menu");
	if (menuObj) {			
		//Force all the sublines into the up state
		this.highlightSub(menuId);
		
		//Set the menu position and make it visible.
		menuObj.style.left = this.getLeftOffset(headId, offsetHorizontal) + "px";
		menuObj.style.top = this.getTopOffset(headId, offsetVertical) + "px";
		menuObj.style.visibility = "visible";
		this.menuOpen = true;
	}

	return false;
}

// Set timer for sub menus
cmsMenu.prototype.clearMenu = function(menuId, suggestedDelay, mainDelay) {
	//Force all the sublines into the up state
	this.highlightSub(menuId);

	var topOver = cmsFindObj(menuId+"_topOver");
	if (topOver) {
		var topUp = cmsFindObj(menuId+"_topUp");
		topOver.style.display = "none";
		topUp.style.display = "";
	}

	//Set the menu to hide when appropriate
	if ((suggestedDelay == null) || this.menuOpen) suggestedDelay = mainDelay;
	if (suggestedDelay == 0) this.hideAll();
	else this.menuTimer = setTimeout("cmsMenuObject.hideAll()", suggestedDelay * 1000);
}

cmsMenu.prototype.clickGo = function(url, loc) {
	this.hideAll();
	if (loc == '_blank') cmsPopLink(url);
	else if (loc == 'script') eval(url);
	else window.location = url;
}

cmsMenu.prototype.hideAll = function(headId, menuId) {
	//de-highlight the head
	if (this.currHead) {
		if (headId != this.currHead) {
			menuId = false;
			this.highlightMain(this.currHead, menuId, 'up');
		}
	}
	
	var origMO = this.menuOpen;
	this.menuOpen = false;
	
	var menuObj;
	var tmpMenuId;
	for (var i = this.menuIds.length-1 ; i >= 0 ; i--) {
		tmpMenuId = this.menuIds[i];
		
		if (tmpMenuId == menuId) {
			//We're leaving a menu open, re-record it.
			this.menuOpen = origMO;
		}
		else {
			menuObj = cmsFindObj(tmpMenuId + "_menu");
			if (menuObj) menuObj.style.visibility = "hidden";
		}
	}
}

var cmsMenuObject = new cmsMenu();