/***********************************************
* 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= -60;	// how far from mouse to show tip
var offY= 12 - 350; 


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

function initTip() {
	if (nodyn) return;
	
	tooltip = (ie4) ? document.all['tipDiv'] : (ie5||ns5) ? document.getElementById('tipDiv') : null;

	if (tooltip && tipFollowMouse) {
		document.onmousemove = positionTip;
	}
}

window.onload = initTip;

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

function doTooltip( evt, id ) {
	if ( !tooltip ) return;
	
	if ( t1 )  clearTimeout( t1 );	
	if ( t2 )  clearTimeout( t2 );
	
	tipOn = true;

	if ( ie4 || ie5 || ns5 )
	 	tooltip.innerHTML = messages[ id ];
	
	positionTip( evt );
	
	if ( tipFollowMouse )
		t1 = setTimeout( "tooltip.style.visibility='visible'", 0 );
}



var mouseX, mouseY;
/////////////////////////////////////////////////////////////
//  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 (tipOn)  {
		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 ) 
			tooltip.style.left = mouseX - ( tpWd + offX ) + "px";
		else 
			tooltip.style.left = mouseX + offX + "px";
		
		if ( ( mouseY + offY + tpHt ) > winHt ) 
			tooltip.style.top = winHt - ( tpHt + offY ) + "px";
		else 
			tooltip.style.top = mouseY + offY + "px";
		
		if ( !tipFollowMouse ) 
			t1 = setTimeout( "tooltip.style.visibility='visible'", 0 );
	}
}

function hideTip() {
	if ( !tooltip ) return;
	
	t2 = setTimeout( "tooltip.style.visibility='hidden'", 0 );
	
	tipOn = false;
}

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