RI = new Array()
  RI[0]= new Image(134,24)
  RI[0].src = "images/company_button.gif"
  RI[1] = new Image(134,24)
  RI[1].src = "images/company_button_off.gif"
  RI[2]= new Image(134,24)
  RI[2].src = "images/our_services_button.gif"
  RI[3] = new Image(134,24)
  RI[3].src = "images/our_services_button_off.gif"
  RI[4]= new Image(134,24)
  RI[4].src = "images/contact_us_button.gif"
  RI[5] = new Image(134,24)
  RI[5].src = "images/contact_us_button_off.gif"
  
  function TCO(){
    document.TC.src = RI[0].src;
    return true;
  }
  function TCB(){
    document.TC.src = RI[1].src;
    return true;
  }
  function OSO(){
    document.OS.src = RI[2].src;
    return true;
  }
  function OSB(){
    document.OS.src = RI[3].src; 
    return true;
  }
    function CUO(){
    document.CU.src = RI[4].src;
    return true;
  }
  function CUB(){
    document.CU.src = RI[5].src; 
    return true;
  }