// Browser safe opacity handling function

  function setOpacity( value ) {
   document.getElementById("popup").style.opacity = value / 10;
   document.getElementById("popup").style.filter = 'alpha(opacity=' + value * 10 + ')';
  }

  function fadeInMyPopup() {
   for( var i = 0 ; i <= 75 ; i++ )
    setTimeout( 'setOpacity(' + (i / 10) + ')' , 8 * i );
  }

  function fadeOutMyPopup() {
   for( var i = 0 ; i <= 100 ; i++ ) {
    setTimeout( 'setOpacity(' + (10 - i / 10) + ')' , 8 * i );
   }

   setTimeout('closeMyPopup()', 800 );
  }

  function closeMyPopup() {
   document.getElementById("popup").style.display = "none"
  }

  function fireMyPopup() {
   setOpacity( 0 );
   document.getElementById("popup").style.display = "block";
   fadeInMyPopup();
  }