/* NAVIGATION SCRIPT */
/* collapsing text */

function expand(thistag) {
   styleObj = document.getElementById(thistag).style;
   if (styleObj.display=='none') {styleObj.display = '';}
   else {styleObj.display = 'none';}
}
var flip = "Start"; // global to save
function toggle() {
if (flip == "Start") {
  flip = "Stop";
  //insert start code here
  copy ='<input name="b" type="button" value="Stop" ';
  copy+='class="zone" onClick="toggle();">';
  document.getElementById('zone').innerHTML=copy;
  } else {
  flip = "Start";
  //insert stop code here
  copy ='<input name="b" type="button" value="Start" ';
  copy+='class="zone" onClick="toggle();">';
  document.getElementById('zone').innerHTML=copy;
  }
}