function doImg(imgName, imgSrc){
 document.images[imgName].src = imgSrc.src;
}

var ns=(document.layers);
var ie=(document.all);
var w3=(document.getElementById && !ie);
var calunit=ns? "" : "px"

var lastTD = "";

function onmouseOverDiv(obj)
{
	obj.style.display = 'block';
}

function onmouseOutDiv(obj)
{
	obj.style.display = 'none';
}

function showSubMenu(objTd, name)
{
	lastTD=objTd;  // last td on menu bar
	var objDiv = document.getElementById(name);
	objDiv.style.display = (objDiv.style.display == "none" || objDiv.style.display == "")? "block" : "none";
	objDiv.style.left = getPosX(objTd) + objTd.offsetWidth - objDiv.offsetWidth +5 + "px";
	objDiv.style.top = getPosY(objTd) + objTd.offsetHeight + "px";
	
}
function hideSubMenu(name)
{
	var objDiv = document.getElementById(name);
	objDiv.style.display = "none";
}

function getPosX(obj)
{
	var curleft = 0;
	while (obj.offsetParent)
	{
	  curleft += obj.offsetLeft;
	  obj = obj.offsetParent;
	}
	return curleft;

}

function getPosY(obj)
{
	var curtop = 0;
	while (obj.offsetParent)
	{
	  curtop += obj.offsetTop;
	  obj = obj.offsetParent;
	}
	return curtop;
}