// Santanu Nandi 2-JAN-2008
window.onload = initTip;
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" }

var tipFollowMouse= true;	
var offX= 5;	// how far from mouse to show tip
var offY= 5; 
var tipFontFamily= "Verdana, arial, helvetica, sans-serif";
var tipFontSize= "8pt";
// set default text color and background color for tooltip here
// but don't have to
var tipFontColor= "#000000";
var tipBgColor= "#FFFFFF"; 
var tipBorderColor= "#000080";
var tipBorderWidth= 1 ;
var tipBorderStyle= "ridge";
var tipPadding= 3;

// startStr goes before image, midStr goes between image and text
var startStr = '<table border="0"><tr><td align="center" width="100%"><img src="';
var midStr = '" border="0"></td></tr><tr><td valign="top" align="center">';
var endStr = '</td></tr></table>';

var tooltip, tipcss;
var initDone = false ;
function initTip() {
	if( initDone ) return ;
	//alert('santanu');
	if (nodyn) return;
	//alert('nandi');
	tooltip = (ie4)? document.all['tipDiv']: (ie5||ns5)? document.getElementById('tipDiv'): null;
	//alert("tooltip="+tooltip);
	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;
	}
	initDone = true ;
}

var t1,t2;	// for setTimeouts
var tipOn = false;	// check if over tooltip link
function doTooltip(evt,imgPath,curFontColor,messages) {	
	document.onmousemove = trackMouse;
	if (!tooltip) return;		
	if( ie5 && document.readyState !='complete' ) return;

	if (t1) clearTimeout(t1);	if (t2) clearTimeout(t2);
	tipOn = true;
	// set colors if included in messages array	
	if (ie4||ie5||ns5) {
		var tip = startStr + imgPath + midStr + '<span style="font-family:' + tipFontFamily + '; font-size:' + tipFontSize + '; color:' + curFontColor + ';">' + messages+ '</span>' + endStr;		
	 	tooltip.innerHTML = tip;
	}	
	if (!tipFollowMouse) positionTip(evt);
	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((mouseX == mouseY == null )|| (mouseX == mouseY == 0))trackMouse;
	if (tipOn) positionTip(evt);
	
}

function positionTip(evt) {	

	//alert("positionTip");
	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>');