function centerWin(win) {
	var sw = screen.width;
	var sh = screen.height;
	
	var ww = win.document.body.clientWidth;
	var wh = win.document.body.clientHeight;
	var x = parseInt((sw - ww)/2);
	var y = parseInt((sh - wh)/2);
	win.moveTo(x,y);
}

function ShowTip(fArg)
{
	var tooltipOBJ = (document.getElementById) ? document.getElementById('tt' + fArg) : eval("document.all['tt" + fArg + "']");
	if (tooltipOBJ != null) {
		var tooltipLft = (document.body.offsetWidth?document.body.offsetWidth:document.body.style.pixelWidth) - (tooltipOBJ.offsetWidth?tooltipOBJ.offsetWidth:(tooltipOBJ.style.pixelWidth?tooltipOBJ.style.pixelWidth:380)) - 30;
		var tooltipTop = 10;
		if (navigator.appName == 'Netscape') {
			tooltipTop = (document.body.scrollTop>=0?document.body.scrollTop+10:event.clientY+10);
 			tooltipOBJ.style.top = tooltipTop+"px";
			tooltipOBJ.style.left = tooltipLft+"px";
		}
		else {
			tooltipTop = (document.body.scrollTop>=0?document.body.scrollTop+10:event.clientY+10);
			tooltipTop = (document.body.scrollTop>=0?document.body.scrollTop+10:event.clientY+10);
			if ((event.clientX > tooltipLft) && (event.clientY < (tooltipOBJ.scrollHeight?tooltipOBJ.scrollHeight:tooltipOBJ.style.pixelHeight) + 10)) {
				tooltipTop = (document.body.scrollTop?document.body.scrollTop:document.body.offsetTop) + event.clientY + 20;
			}
			tooltipOBJ.style.left = tooltipLft;
			tooltipOBJ.style.top = tooltipTop;
		}
		tooltipOBJ.style.visibility = "visible";
	}
}
function HideTip(fArg)
{
	var tooltipOBJ = (document.getElementById) ? document.getElementById('tt' + fArg) : eval("document.all['tt" + fArg + "']");
	if (tooltipOBJ != null) {
		tooltipOBJ.style.visibility = "hidden";
	}
}

function checkQuantity(objId)
{
  var obj = document.getElementById(objId);
  if (obj!=null && obj.value*1 > 0)
  {
    return true;
  }
  return false;
}

function openPopUpComercial(url, w, h) {
	var win = window.open(url,'','width='+w+',height='+h+',location=no,directories=no,menubar=no,resizable=no,toolbar=no,status=no,scrollbars=no');
	centerWin(win);
	return win;
}