var dom = (document.getElementById) ? true : false;
var ns5 = (!document.all && dom || window.opera) ? true: false;
var ie5 = ((navigator.userAgent.indexOf("MSIE") > -1) && dom) ? true : false;
var ie4 = (document.all && !dom) ? true : false;
var nodyn = (!ns5 && !ie4 && !ie5 && !dom) ? true : false;

// avoid error of passing event object in older browsers
if (nodyn)
{
	event = "nope"; 
}

///////////////////////  CUSTOMIZE HERE   ////////////////////
// settings for tooltip

// Do you want tip to move when mouse moves over link?
var tipFollowMouse = true; 

// Be sure to set tipWidth wide enough for widest image
var tipWidth = 106;
var tipHeight = 40;
var offX = 10;	// how far from mouse to show tip
var offY = 0; 
var tipFontFamily = "Verdana, arial, helvetica, sans-serif";
var tipFontSize = "1pt";

// set default text color and background color for tooltip here
// individual tooltips can have their own (set in messages arrays)
// but don't have to
var tipFontColor = "#000000";
var tipBgColor = "#000000"; // "#DDECFF"; 
var tipBorderColor = "#000080";
var tipBorderWidth = 2;
var tipBorderStyle = "ridge";
var tipPadding = 1;

// tooltip content goes here (image, description, optional bgColor, optional textcolor)
var messages = new Array();

// multi-dimensional arrays containing: 
// image and text for tooltip
// optional: bgColor and color to be sent to tooltip

//messages[0] = new Array('imagename.jpg','',"#FFFFFF");

////////////////////  END OF CUSTOMIZATION AREA  ///////////////////

// preload images that are to appear in tooltip
// from arrays above
if (document.images)
{
	var theImgs = new Array();
	
	for (var i = 0; i < messages.length; i++) 
	{
		theImgs[i] = new Image();
		theImgs[i].src = messages[i][0];
	}
}

// to layout image and text, 2-row table, image centered in top cell
// these go in var tip in doTooltip function
// startStr goes before image, midStr goes between image and text
var startStr = '<table width="' + tipWidth + '"><tr><td align="center" width="100%"><img src="';
var midStr = '" border="0"></td></tr><tr><td valign="top">';
var endStr = '</td></tr></table>';

////////////////////////////////////////////////////////////
//  initTip	- initialization for tooltip.
//		Global variables for tooltip. 
//		Set styles
//		Set up mousemove capture if tipFollowMouse set true.
////////////////////////////////////////////////////////////
var tooltip, tipcss;

function initTip()
{
	if (nodyn)
	{
		return;
	}
	
	tooltip = (ie4) ? document.all['tipDiv'] : (ie5 || ns5) ? document.getElementById('tipDiv') : null;
	tipcss = tooltip.style;
	
	if (ie4 || ie5|| ns5)
	{	// ns4 would lose all this on rewrites
		tipcss.width = tipWidth + "px";
		tipcss.fontFamily = tipFontFamily;
		tipcss.fontSize = tipFontSize;
		tipcss.color = tipFontColor;
		tipcss.backgroundColor = tipBgColor;
		tipcss.borderColor = tipBorderColor;
		tipcss.borderWidth = tipBorderWidth + "px";
		tipcss.padding = tipPadding + "px";
		tipcss.borderStyle = tipBorderStyle;
	}
	
	if (tooltip && tipFollowMouse)
	{
		document.onmousemove = trackMouse;
	}
}

/////////////////////////////////////////////////
//  doTooltip function
//			Assembles content for tooltip and writes 
//			it to tipDiv
/////////////////////////////////////////////////
var t1, t2;	// for setTimeouts
var tipOn = false;	// check if over tooltip link

function doTooltip(evt,num)
{
	if (!tooltip)
	{
		initTip();
	}
	
	if (!tooltip)
	{
		return;
	}
	
	if (t1)
	{
		clearTimeout(t1);
	}
	
	if (t2)
	{
		clearTimeout(t2);
	}
	
	tipOn = true;
	
	// set colors if included in messages array
	if (messages[num][2])
	{
		var curBgColor = messages[num][2];
	}
	else
	{
		curBgColor = tipBgColor;
	}
	
	if (messages[num][3])
	{
		var curFontColor = messages[num][3];
	}
	else
	{
		curFontColor = tipFontColor;
	}
	
	if (ie4 || ie5 || ns5) 
	{
		var tip = startStr + messages[num][0] + midStr + '<span style="font-family:' + tipFontFamily + 
			'; font-size:' + tipFontSize + '; color:' + curFontColor + ';">' + messages[num][1] + '</span>' + endStr;
		tipcss.backgroundColor = curBgColor;
	 	tooltip.innerHTML = tip;
	}
	
	if (!tipFollowMouse) 
	{
		positionTip(evt);
	}
	else
	{
		t1 = setTimeout("tipcss.visibility='visible'", 100);
	}
}

var mouseX, mouseY;

function trackMouse(evt)
{
	standardbody = (document.compatMode == "CSS1Compat") ? document.documentElement : document.body //create reference to common "body" across doctypes
	mouseX = (ns5) ? evt.pageX : window.event.clientX + standardbody.scrollLeft;
	mouseY = (ns5) ? evt.pageY : window.event.clientY + standardbody.scrollTop;
	
	if (tipOn)
	{
		positionTip(evt);
	}
}

function hideTip()
{
	if (!tooltip)
	{
		return;
	}
	
	t2 = setTimeout("tipcss.visibility='hidden'", 100);
	tipOn = false;
}

/////////////////////////////////////////////////////////////
//  positionTip function
//		If tipFollowMouse set false, so trackMouse function
//		not being used, get position of mouseover event.
//		Calculations use mouseover event position, 
//		offset amounts and tooltip width to position
//		tooltip within window.
/////////////////////////////////////////////////////////////
function positionTip(evt) 
{
	if (!tipFollowMouse) 
	{
		standardbody = (document.compatMode == "CSS1Compat") ? document.documentElement : document.body;
		mouseX = (ns5) ? evt.pageX : window.event.clientX + standardbody.scrollLeft;
		mouseY = (ns5) ? evt.pageY : window.event.clientY + standardbody.scrollTop;
	}
	
	// tooltip width and height
	var tpWd = (ie4 || ie5) ? tooltip.clientWidth : tooltip.offsetWidth;
	var tpHt = (ie4 || ie5) ? tooltip.clientHeight : tooltip.offsetHeight;
	
	// document area in view (subtract scrollbar width for ns)
	var winWd = (ns5) ? window.innerWidth - 20 + window.pageXOffset : standardbody.clientWidth + standardbody.scrollLeft;
	var winHt = (ns5) ? window.innerHeight - 20 + window.pageYOffset : standardbody.clientHeight + standardbody.scrollTop;
	
	// check mouse position against tip and window dimensions and position the tooltip 
	if ((mouseX + offX + tpWd) > winWd)
	{
		tipcss.left = mouseX - (tpWd + offX) + "px";
	}
	else
	{
		tipcss.left = mouseX + offX + "px";
	}
	
	if ((mouseY + offY + tpHt) > winHt)
	{
		tipcss.top = winHt - (tpHt + offY) + "px";
	}
	else
	{
		tipcss.top = mouseY + offY + "px";
	}
	
	if (!tipFollowMouse)
	{
		t1 = setTimeout("tipcss.visibility='visible'", 100);
	}
}

document.write("<div id='tipDiv' style='position: fixed; visibility: hidden; z-index: 101;'></div>");