function slide_l(FILE)
  {  
  landscape = window.open(FILE,"slide_l","scrollbars=no,resizable=yes,width=620,height=420");
  landscape.focus();
  }

function slide_p(FILE)
  {  
  portrait = window.open(FILE,"slide_p","scrollbars=no,resizable=yes,width=420,height=620");
  portrait.focus();
  }

function txt(FILE)
  {  
  text = window.open(FILE,"text","scrollbars=yes,resizable=yes,width=650,height=450");
  text.focus();
  }

function WindowClose()
  {
  portrait.close();
  landscape.close();
  text.close();
  }