function initRegPage(){
  var mobileForm = document.getElementById("mobilePhoneForm");
  if(mobileForm != null){
      syncMobilePhoneRegDisplay();
  }
}

function syncMobilePhoneRegDisplay(theForm) {
    if (document.getElementById("mobilePhoneRegCheck").value=="required" ||
        document.getElementById("mobilePhoneRegCheck").checked == true) {
        document.getElementById("mobilePhoneForm").style.display = "block";
	} else {
        document.getElementById("mobilePhoneForm").style.display = "none";
	}
}