if (document.images) {
   img01on = new Image();   img01on.src = "../images/btn_welcome_on.gif";
   img02on = new Image();   img02on.src = "../images/btn_about_on.gif";
   img03on = new Image();   img03on.src = "../images/btn_program_on.gif";
   img04on = new Image();   img04on.src = "../images/btn_fees_on.gif";
   img05on = new Image();   img05on.src = "../images/btn_information_on.gif"; 
   img06on = new Image();   img06on.src = "../images/btn_health_on.gif"; 
   img07on = new Image();   img07on.src = "../images/btn_contact_on.gif";  
   img08on = new Image();   img08on.src = "../images/btn_back_on.gif"; 
   img09on = new Image();   img09on.src = "../images/btn_philosophy_on.gif"; 
   img10on = new Image();   img10on.src = "../images/btn_goals_on.gif"; 
   img11on = new Image();   img11on.src = "../images/btn_port_on.gif";  

      
   img01off = new Image();   img01off.src = "../images/btn_welcome.gif";
   img02off = new Image();   img02off.src = "../images/btn_about.gif";
   img03off = new Image();   img03off.src = "../images/btn_program.gif";
   img04off = new Image();   img04off.src = "../images/btn_fees.gif";
   img05off = new Image();   img05off.src = "../images/btn_information.gif";
   img06off = new Image();   img06off.src = "../images/btn_health.gif"; 
   img07off = new Image();   img07off.src = "../images/btn_contact.gif"; 
   img08off = new Image();   img08off.src = "../images/btn_back.gif"; 
   img09off = new Image();   img09off.src = "../images/btn_philosophy.gif";
   img10off = new Image();   img10off.src = "../images/btn_goals.gif"; 
   img11off = new Image();   img11off.src = "../images/btn_port.gif"; 

}

function imgOn(imgName)
{
   if (document.images) {
      document[imgName].src = eval(imgName + "on.src");
   }
}

function imgOff(imgName)
{
   if (document.images) {
      document[imgName].src = eval(imgName + "off.src");
   }
}