// rollovers


 var img = new Array(18);
 
 img[0] = new Image();
 img[0].src = "media/menu_company_over.gif";
 
 img[1] = new Image();
 img[1].src = "media/menu_company_down.gif";
 
 img[2] = new Image();
 img[2].src = "media/menu_tech_over.gif";
 
 img[3] = new Image();
 img[3].src = "media/menu_tech_down.gif";
 
 img[4] = new Image();
 img[4].src = "media/menu_realestate_over.gif";
 
 img[5] = new Image();
 img[5].src = "media/menu_realestate_down.gif";
 
 img[6] = new Image();
 img[6].src = "media/menu_oil_over.gif";
 
 img[7] = new Image();
 img[7].src = "media/menu_oil_down.gif";
 
 img[8] = new Image();
 img[8].src = "media/menu_flink_over.gif";
 
 img[9] = new Image();
 img[9].src = "media/menu_flink_down.gif";
 
 img[10] = new Image();
 img[10].src = "media/menu_contact_over.gif";
 
 img[11] = new Image();
 img[11].src = "media/menu_contact_down.gif";
 
 currentIndex = 0;
 oldSrc = ""; 
 
 function on(index) {
  if(document.images) {
    currentIndex = index;
    oldSrc = document.images["nav" + index].src;
    document.images["nav" + index].src = img[index].src;
    }
  }
  
 function off() {
  if(document.images) {
    document.images["nav" + currentIndex].src = oldSrc;
  }
}