function ChangeMonthTab() {
    var month = document.getElementById("txtBirthMonth").value;
    var txtday = document.getElementById("txtBirthDay")
    var txtmonth = document.getElementById("txtBirthMonth");
    if (month.length > 1) {
        txtmonth.blur();
        txtday.focus();
    }
}
function ChangeDayTab() {
    var day = document.getElementById("txtBirthDay").value;
    var txtday = document.getElementById("txtBirthDay")
    var txtyear = document.getElementById("txtBirthYear")
    if (day.length > 1) {
        txtday.blur();
        txtyear.focus();
    }
}
function ChangePhoneLeftTab() {
    var left = document.getElementById("txtPhLeft").value;
    var txtleft = document.getElementById("txtPhLeft")
    var txtmiddle = document.getElementById("txtPhMiddle")
    if (left.length > 2) {
        txtleft.blur();
        txtmiddle.focus();
    }
}
function ChangePhoneRightTab() {
    var middle = document.getElementById("txtPhMiddle").value;
    var txtmiddle = document.getElementById("txtPhMiddle")
    var txtright = document.getElementById("txtPhRight")
    if (middle.length > 2) {
        txtmiddle.blur();
        txtright.focus();
    }
}

function TxtGuardianDisable() {
    var day = document.getElementById("txtBirthDay").value;
    var month = document.getElementById("txtBirthMonth").value;
    var year = document.getElementById("txtBirthYear").value;
    var date = new Date(parseInt(year) + 18, parseInt(month) - 1, parseInt(day));
    var mydate = new Date();
    var txtGuardian = document.getElementById("txtGuardian");
    if (date > mydate)
        txtGuardian.parentNode.parentNode.style.display = "block";
    else
        txtGuardian.parentNode.parentNode.style.display = "none";
}



function CountryChanged()
{
     var ddCountry=document.getElementById("ddCountry");
     var country=ddCountry[ddCountry.selectedIndex].text;

    var txtState=document.getElementById("txtState");

    var ddState=document.getElementById("ddState");
   
  if(country =="United States")
    {
        txtState.style.display = "none";
        ddState.style.display = ""; 
    }
else{
        ddState.style.display = "none";
        document.getElementById("txtState").value="";
        txtState.style.display = "";

        
        
    }
}