function openw( daLink )
        {
        var comwin = window.open(daLink,'Add','width=560,height=600,scrollbars=no,resize=no') ;
        }
        

about = new Image();
  about_on = new Image();
  about.src = "images/about.gif" 
  about_on.src = "images/about_on.gif"

  services = new Image();
  services_on = new Image();
  services.src = "images/services.gif" 
  services_on.src = "images/services_on.gif"

  port = new Image();
  port_on = new Image();
  port.src = "images/port.gif" 
  port_on.src = "images/port_on.gif"

  prices = new Image();
  prices_on = new Image();
  prices.src = "images/prices.gif" 
  prices_on.src = "images/prices_on.gif"

  contact = new Image();
  contact_on = new Image();
  contact.src = "images/contact.gif" 
  contact_on.src = "images/contact_on.gif"


 function on(name) {
       eval('document.images[name].src='+name+'_on.src');
       return true;}
 function off(name) {
       eval('document.images[name].src='+name+'.src');
       return true;}