function contact()
{
	openWindow('contact.htm',450,300);
}
function openWindow(window_url,width,height)
{
  var leftPos = 0;
	var topPos  = 0;

  if (screen) 
	{
  	leftPos = (screen.width/2) - (width/2)
		topPos  = (screen.height/2) - (height/2)
  }

	var new_window = window.open(window_url, '_newWnd','height=' + height + ',width=' + width + ',status=0,toolbar=0,resizable=0,scrollbars=1,menubar=0,location=0,directories=0,left='+leftPos+',top='+topPos+'');
}