var sh=screen.availHeight; var sw = screen.availWidth; var windowName=null; var masterActueel=null;

function openWindow(name, ref, w, h)
{
	posX = sw/2 - w/2; posY =90; naam='venster';
	
	if (document.all)
	{
		windowName=null;	
		attr='height=' + h + ',width=' + w + ',top=' + posY + ',left=' + posX + ',status=no,toolbar=no,menubar=no,resizable=no,scrollbars=no';		
		windowName=window.open(ref,naam,attr);
		
		if (mac) windowName.moveTo(posX, posY);
	}
	else
	{
		if (!windowName || windowName.closed)
		{
			attr='height=' + h + ',width=' + w + ',screenY=' + posY + ',screenX=' + posX+ ',status=no,toolbar=no,menubar=no,resizable=no,scrollbars=no';	
			windowName=window.open(ref,naam,attr);
		 	if (!windowName.opener) windowName.opener = self;
		}	
		else 
			windowName.location=ref; windowName.focus();
	}
}

function openActueel(ref, w, h)
{
	posX = 30; posY =90;
	masterActueel=null;	
		
	if (document.all)
	{
		attr='height=' + h + ',width=' + w + ',top=' + posY + ',left=' + posX + ',status=no,toolbar=no,menubar=no,resizable=no,scrollbars=yes';		
		masterActueel=window.open(ref,'actueel',attr);
		
 		if (!masterActueel.opener) masterActueel.opener = self;	
		
		if (mac) masterActueel.moveTo(posX, posY);
	}
	else
	{
		attr='height=' + h + ',width=' + w + ',screenY=' + posY + ',screenX=' + posX+ ',status=no,toolbar=no,menubar=no,resizable=no,scrollbars=yes';	
		masterActueel=window.open(ref,'actueel',attr);	
		
		if (!masterActueel.opener) masterActueel.opener = self;	
	}
}

function closeWindow(windowName)
{
	if (windowName != null)
		if(!windowName.closed)
		{
			windowName.close();
			windowName=null;
		}
}