var vbmenu_usepopups = true;
var vbmenu_registered = new Array();
var vbmenu_initialized = new Array();
var vbmenu_activemenus = new Array();
var vbmenu_currentactive = true;
var slidetimer = false;
var vbmenu_opensteps = 10;
var vbmenu_doslide = true;
var vbmenu_dofade = false; // can be very slow

var vbmenu_datefields = new Array();
function vbmenu_doregister(controlid, nowrite, datefield)
{
	if (document.getElementsByTagName)
	{
		controlobj = fetch_object(controlid);
		if (controlobj)
		{			
			if (datefield)
			{
				vbmenu_datefields[controlid] = datefield;
			}
			
			vbmenu_registered[vbmenu_registered.length] = controlid;
			
			if (!nowrite)
			{
				document.write('');
			}
			return true;
		}
	}
	
	return false;
}
// function to get the menu basename - 'menu.104' returns 'menu', 'x.menu' returns 'x'
function vbmenu_getmenuid(controlid)
{
	dotpos = controlid.indexOf(".");
	if (dotpos != -1)
	{
		return controlid.substr(0, dotpos);
	}
	else
	{
		return controlid;
	}
}
// handle menu control mouseover events
function vbmenu_eventhandler_mouseover()
{
	vbmenu_open(this);
}
// close all open menus
function vbmenu_close()
{
	if (vbmenu_currentactive)
	{
		for (key in vbmenu_activemenus)
		{
			fetch_object(vbmenu_getmenuid(key) + "_menu").style.display = "none";
			vbmenu_activemenus[key] = false;
		}
	}
	vbmenu_currentactive = false;
	
	if (slidetimer)
	{
		clearTimeout(slidetimer);
		slidetimer = false;
	}
	
	if (is_ie)
	{
		selects = document.getElementsByTagName("select");
		for (var i = 0; i < selects.length; i++)
		{
			selects[i].style.visibility = "visible";
		}
	}
}
// detect if selectobj overlaps m
function vbmenu_overlap(selectobj, m)
{
	s = new Array();
	s['L'] = fetch_object_posleft(selectobj);
	s['T'] = fetch_object_postop(selectobj);	
	s['R'] = s['L'] + selectobj.offsetWidth;
	s['B'] = s['T'] + selectobj.offsetHeight;
	
	if (s['L'] >= m['L'] && s['L'] <= m['R'] && ((s['T'] >= m['T'] && s['T'] <= m['B']) || (s['B'] >= m['T'] && s['B'] <= m['B']))) { return true; }
	else if (s['R'] >= m['L'] && s['R'] <= m['R'] && ((s['T'] >= m['T'] && s['T'] <= m['B']) || (s['B'] >= m['T'] && s['B'] <= m['B']))) { return true; }
	else if (s['B'] >= m['T'] && s['T'] <= m['B'] && ((s['L'] >= m['L'] && s['L'] <= m['R']) || (s['R'] >= m['R'] && s['R'] <= m['R']))) { return true; }
	else if (m['B'] >= s['T'] && m['T'] <= s['B'] && ((m['L'] >= s['L'] && m['L'] <= s['R']) || (m['R'] >= s['R'] && m['R'] <= s['R']))) { return true; }
	else { return false; }
}
// open the clicked menu
function vbmenu_open(elm)
{
	openmenu = vbmenu_currentactive;
	vbmenu_close();
	// get the id of the menu to be opened
	menuid = vbmenu_getmenuid(elm.id) + "_menu";	
	menuobj = fetch_object(menuid);
	if(vbmenu_datefields[elm.id])
	{
		force_right_slide = true;
		fetch_object(elm.id + "_output").innerHTML = fetch_object(vbmenu_datefields[elm.id]).value;
	}
	else
	{
		force_right_slide = false
	}
	vbmenu_activemenus[elm.id] = true;
	vbmenu_currentactive = elm.id;
	// get menu position
	leftpx = fetch_object_posleft(elm);
	toppx = fetch_object_postop(elm) + elm.offsetHeight;
	// un-hide menu	
	menuobj.style.display = "";
	// attempt to keep menu on screen
	if(force_right_slide || (leftpx + menuobj.offsetWidth) >= document.body.clientWidth)
	{
		leftpx = leftpx + elm.offsetWidth - menuobj.offsetWidth;
		slidedir = "right";
	}
	else
	{
		slidedir = "left";
	}
	// shuffle the IE menus a bit
	if(is_ie)
	{
		leftpx += (slidedir == "left") ? -2 : 2;
	}
	// set menu position
	menuobj.style.left = leftpx + "px";
	menuobj.style.top = toppx + "px";
	
	if(is_ie)
	{	
		menuarea = {
			"L" : leftpx,
			"T" : toppx,
			"R" : leftpx + menuobj.offsetWidth,
			"B" : toppx + menuobj.offsetHeight
		};		
		selects = document.getElementsByTagName("select");
		for(var i = 0; i < selects.length; i++)
		{
			if (vbmenu_overlap(selects[i], menuarea))
			{
				selects[i].style.visibility = "hidden";
			}
		}
	}
	// slide menus open (internet explorer only)
	if(vbmenu_doslide && !is_opera && !is_ie4)
	{
		if(vbmenu_dofade && is_ie)
		{
			menuobj.filters.item('DXImageTransform.Microsoft.alpha').opacity = 0;
		}
		intervalX = Math.ceil(menuobj.offsetWidth / vbmenu_opensteps);
		intervalY = Math.ceil(menuobj.offsetHeight / vbmenu_opensteps);
		
		if(slidedir == "left")
		{
			menuobj.style.clip = "rect(auto, 0px, 0px, auto)";
			vbmenu_slide_left(menuid, intervalX, intervalY, 0, 0, 0);
		}
		else
		{
			menuobj.style.clip = "rect(auto, auto, 0px, " + (menuobj.offsetWidth) + "px)";
			vbmenu_slide_right(menuid, intervalX, intervalY, menuobj.offsetWidth, 0, 0);
		}
	}
	
	return false;
}
// internet explorer slide menu open left
function vbmenu_slide_left(menuid, intervalX, intervalY, clipX, clipY, opacity)
{
	menuobj = fetch_object(menuid);
	
	if (clipX < menuobj.offsetWidth || clipY < menuobj.offsetHeight)
	{
		if (vbmenu_dofade && is_ie)
		{
			opacity += 10;
			menuobj.filters.item('DXImageTransform.Microsoft.alpha').opacity = opacity;
		}
		clipX += intervalX;
		clipY += intervalY;
		menuobj.style.clip = "rect(auto, " + clipX + "px, " + clipY + "px, auto)";
		slidetimer = setTimeout("vbmenu_slide_left('" + menuid + "', " + intervalX + ", " + intervalY + ", " + clipX + ", " + clipY + ", " + opacity + ");", 0);
	}
	else
	{
		clearTimeout(slidetimer);
	}
}
// internet explorer slide menu open right
function vbmenu_slide_right(menuid, intervalX, intervalY, clipX, clipY, opacity)
{
	menuobj = fetch_object(menuid);
	
	if (clipX > 0 || clipY < menuobj.offsetHeight)
	{
		if (vbmenu_dofade && is_ie)
		{
			opacity += 10;
			menuobj.filters.item('DXImageTransform.Microsoft.alpha').opacity = opacity;
		}
		clipX -= intervalX;
		clipY += intervalY;
		menuobj.style.clip = "rect(auto, " + menuobj.offsetWidth + "px, " + clipY + "px, " + clipX + "px)";
		slidetimer = setTimeout("vbmenu_slide_right('" + menuid + "', " + intervalX + ", " + intervalY + ", " + clipX + ", " + clipY + ", " + opacity + ");", 0);
	}
	else
	{
		clearTimeout(slidetimer);
	}
}
// function to toggle the background class of a menu option
function vbmenu_switch_option_bg(e)
{
	this.className = (this.className == "vbmenu_option") ? "vbmenu_hilite" : "vbmenu_option";
	this.style.cursor = "hand";
}
// function to initialize a single menu entry
function vbmenu_init(controlid)
{
	menuid = vbmenu_getmenuid(controlid) + "_menu";
	menuobj = fetch_object(menuid);
	
	if (document.getElementsByTagName && menuobj)
	{
		// do control object
		controlobj = fetch_object(controlid);
		controlobj.style.cursor = "hand";
		controlobj.unselectable = true;
		controlobj.onmouseover = vbmenu_eventhandler_mouseover;
		
		// don't initialize the same popup menu twice
		if (vbmenu_initialized[menuid])
		{
			return;
		}
		
		// do popup menu object
		popupobj = fetch_object(menuid);
		popupobj.style.display = "none";
		popupobj.style.position = "absolute";
		popupobj.style.left = "0px";
		popupobj.style.top = "0px";
		
		// reset inner table width
		tables = popupobj.getElementsByTagName("table");
		if (tables.length > 0)
		{
			tables[0].width = "";
		}
		
		// init popup filters (ie only)
		if (is_ie)
		{		
			popupobj.style.filter += "progid:DXImageTransform.Microsoft.alpha(enabled=1,opacity=100)";
			popupobj.style.filter += "progid:DXImageTransform.Microsoft.shadow(direction=135,color=#8E8E8E,strength=3)";
		}
		
		// do menu options
		tds = popupobj.getElementsByTagName("td");
		for (var i = 0; i < tds.length; i++)
		{			
			if (tds[i].className == "vbmenu_option")
			{
				tds[i].style.cursor = "default";
				if (tds[i].title == "nohilite")
				{
					tds[i].title = "";
				}
				else
				{
					tds[i].onmouseover = vbmenu_switch_option_bg;
					tds[i].onmouseout = vbmenu_switch_option_bg;
				}
			}
		}
		
		vbmenu_initialized[menuid] = true;
	}
}