home_off=new Image(57,15);
  home_off.src="images/home_off.jpg";
  home_on=new Image(57,15);
  home_on.src="images/home_on.jpg";

  file_off=new Image(88,15);
  file_off.src="images/file_off.jpg";
  file_on=new Image(88,15);
  file_on.src="images/file_on.jpg";
   
  administration_off=new Image(104,15);
  administration_off.src="images/administration_off.jpg";
  administration_on=new Image(104,15);
  administration_on.src="images/administration_on.jpg";
  
  reports_off=new Image(64,15);
  reports_off.src="images/reports_off.jpg";
  reports_on=new Image(64,15);
  reports_on.src="images/reports_on.jpg";
 
  options_off=new Image(66,15);
  options_off.src="images/options_off.jpg";
  options_on=new Image(66,15);
  options_on.src="images/options_on.jpg";

  
  preview_off=new Image(72,15);
  preview_off.src="images/preview_off.jpg";
  preview_on=new Image(72,15);
  preview_on.src="images/preview_on.jpg";
  
  logout_off=new Image(62,15);
  logout_off.src="images/logout_off.jpg";
  logout_on=new Image(62,15);
  logout_on.src="images/logout_on.jpg";