/***********************************************
* Image w/ description tooltip- By Dynamic Web Coding (www.dyn-web.com)
* Copyright 2002-2007 by Sharon Paine
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/

/* IMPORTANT: Put script after tooltip div or 
put tooltip div just before </BODY>. */

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;

var origWidth, origHeight;

// 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= 160;
var offX= 20;	// how far from mouse to show tip
var offY= 12; 
var tipFontFamily= "Verdana, arial, helvetica, sans-serif";
var tipFontSize= "8pt";
// 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= "#FFFFFF";
var tipBorderColor= "#000000";
var tipBorderWidth= 3;
var tipBorderStyle= "ridge";
var tipPadding= 4;

// 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('red_balloon.gif','Here is a red balloon on a white background',"#FFFFFF");
//messages[1] = new Array('duck2.gif','Here is a duck on a light blue background.',"#DDECFF");
//messages[2] = new Array('test.gif','Test description','black','white');

////////////////////  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;
    }
  }

window.onload = initTip;

/////////////////////////////////////////////////
//  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) 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);
  }

/////////////////////////////////////////////////////////////
//  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);
  }

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

//document.write('<div id="tipDiv" style="position:absolute; visibility:hidden; z-index:100"></div>')

/*utilisation
<a href="#" onmouseover="doTooltip(event,0)" onmouseout="hideTip()">Link 1</a><br>
<a href="#" onmouseover="doTooltip(event,1)" onmouseout="hideTip()">Link 2</a>
*/