var isWindowOpen="no";
function popup(file,titel,width,height)
{

     if(file=="0") return(false);

	if(file.indexOf("wnd",0)!=-1)
	{
		window.location.href=file.substring(3);
		return(false);
	}
	if(file.indexOf("new",0)!=-1)
	{
		thewindow=window.open(file.substring(3),'namn');
		return(false);
	}

	if(isWindowOpen=="no")
	{
     		isWindowOpen="yes";
     		thewindow=window.open(file,titel,'toolbar=no,status=no,height=' + height + ', width=' + width + ', scrollbars=yes');     	
	}
	else
	{
     		thewindow.close();
     		thewindow=window.open(file,titel,'toolbar=no,status=no,height=' + height + ', width=' + width + ', scrollbars=yes');     	
	}

}