function nw(oFile, wWidth, wHeight)
{
	var cWidth=window.screen.width;
	var cHeight=window.screen.height;
	
	if(cHeight && cWidth){
		var leftOffset=Math.ceil((cWidth-wWidth)/2);
		var topOffset=Math.ceil((cHeight-wHeight)/2);
		var a=window.open(oFile, "nm", 'width='+wWidth+',height='+wHeight+',top='+topOffset+',left=' + leftOffset);
		a.focus();
	}
	return false;
}