//window.onload = "startKeepAlive()";
function showHide() { //used to show or hide school or individual mode table
  if(document.getElementById('select')){
    var val=document.getElementById('select').value;
    if(val=='schoolmode') {
      document.getElementById('school_reg').style.display='';
      document.getElementById('individual_reg').style.display='none';
    } else {
      document.getElementById('school_reg').style.display='none';
      document.getElementById('individual_reg').style.display='';
    }
  }
}

function keepAlive(imgName) {
   myImg = document.getElementById(imgName);
   if (myImg) myImg.src = myImg.src.replace(/\?.*$/, '?' + Math.random());
}

function startKeepAlive(){
  var d = document.createElement('div');
  d.id = 'keepalive';
  d.src = '/img/spacer.gif?';
  document.body.appendChild(d);
  window.setInterval("keepAlive('keepalive')", 600000); // q 10"
}