var timer1ID = 0;
var toggle1 = 1;

function UpdateTimer1() {
   if(timer1ID) {
      clearTimeout(timer1ID);
   }
   if (toggle1) {
       toggle1 = 0;
       document.getElementById('CHGCOLOR1').style.backgroundColor = "#CC0000";
   } else {
       toggle1 = 1;
       document.getElementById('CHGCOLOR1').style.backgroundColor = "#336633";
   }
   timer1ID = setTimeout("UpdateTimer1()", 10000);
}