var timer3ID = 0;
var toggle3 = 1;

function UpdateTimer3() {
   if(timer3ID) {
      clearTimeout(timer3ID);
   }
   if (toggle3) {
       toggle3 = 0;
       document.getElementById('CHGCOLOR3').style.backgroundColor = "#CC0000";
   } else {
       toggle3 = 1;
       document.getElementById('CHGCOLOR3').style.backgroundColor = "#336633";
   }
   timer3ID = setTimeout("UpdateTimer3()", 6000);
}