var tipFollowMouse= true;	// Cho phép phần hiển thị di chuyển theo chuột ko?
var offX=0;	// Toạ độ x,y phần hiện thị cách điểm chuột
var offY=0;
document.write('<div id="tipDiv" style="position:absolute; visibility:hidden; z-index:100"></div>')

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;
if (nodyn) { event = "nope" }// avoid error of passing event object in older browsers
var tooltip;//lưu noi dung cua the DIV dua vao
var tipcss;
function initTip() {
	if (nodyn) return;
	tooltip = (ie4)? document.all['tipDiv']: (ie5||ns5)? document.getElementById('tipDiv'): null;
	tipcss = tooltip.style;
	if (tooltip&&tipFollowMouse) {
		document.onmousemove = trackMouse;
	}
}
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);
}
window.onload = initTip;//Kiểm tra phiên bản trình duyệt

var t1,t2;	// for setTimeouts
var tipOn = false;	// check if over tooltip link

function doTooltip(evt,divID,xx,yy) {
offX=xx;
offY=yy;
	if (!tooltip) return;
	if (t1) clearTimeout(t1);	
	if (t2) clearTimeout(t2);
	tipOn = true;	
	if (ie4||ie5||ns5) {
	 	tooltip.innerHTML = document.getElementById(divID).innerHTML;
	}
	if (!tipFollowMouse) positionTip(evt);
	else t1=setTimeout("tipcss.visibility='visible'",100);
}
/////////////////////////////////////////////////////////////
//  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;
	setTimeout("tipcss.visibility='hidden'",100);
	tipOn = false;
}