function toggleDropdown( elem ) {
    if( $("#containerDropdown").css( 'display' ) == 'none' ) {
      var offsets = $( elem ).offset();
      //offsets.top -= $( elem ).height() / 2 + 10;
      //offsets.left -= $( elem ).width() / 2 + 10;
      //offsets.top -= $( elem ).height() / 2;
      offsets.top -= 18;
      offsets.left -= 19;
      if( offsets.top < 0 ) {
        offsets.top = 0;
      }
      if( offsets.left < 0 ) {
        offsets.left = 0;
      }
      $("#containerDropdown").css('top', offsets.top );
      $("#containerDropdown").css('left', offsets.left );
      $("#containerDropdown").show();
      //$("#containerDropdown").fadeIn("slow");
      $("#frameDropdown").width( $("#containerDropdown").width() );
      $("#frameDropdown").height( $("#containerDropdown").height() );
      $("#frameDropdown").show();
    } else {
      $("#frameDropdown").hide();
      $("#containerDropdown").hide();
      //$("#containerDropdown").fadeOut("slow");
    }
  }