function openNew(file,imgWidth,imgHeight,scrolling)
{
  ypos = (screen.height / 2) - imgHeight/2;
  xpos = (screen.width / 2) - imgWidth/2;
  NewWindow1 = window.open(file, "Win1", "height="+imgHeight+",width="+imgWidth+",toolbar=0,menubar=0,scrollbars="+scrolling+",status=1,location=0,left="+xpos+",top="+ypos+"screenx="+xpos+",screeny="+ypos);
  NewWindow1.focus();
}