var tollfree=new Array();
  tollfree[0]='NA: 1-877-603-1710';    /* add as many quotes as you like!*/
  tollfree[1]='AU: 1-800-737-643';
  tollfree[2]='NZ: 0800-451353';
var speed=3500;    /*this is the time in milliseconds adjust to suit*/
var q=0;

function showtollfree() {

     document.getElementById("tollfree").innerHTML=tollfree[q];
     q++;
if(q==tollfree.length) {
     q=0;
  }
}
setInterval('showtollfree()',speed);