// JavaScript Document
function updatePhone ( )
{
  // (do something here)
  if(array_count > trevor.length -1){
	  array_count = 0;
  }
  document.getElementById('dePhone').innerHTML = trevor[array_count];//time_left;
  array_count ++;
}
trevor = Array('1800 S E RENTALS', '1800 73 73 68');
 array_count = 0;
setInterval ( "updatePhone()", 3000 );