// form validation function //
function validate(form) {
  var firstname = form.firstname.value;
  var lastname = form.lastname.value;
  var email = form.email.value;
  var phone = form.phone.value;
  var address = form.address.value;
  var city = form.city.value;
  var state = form.state.value;
  var zip = form.zip.value;
  var emfirstname = form.emfirstname.value;
  var emlastname = form.emlastname.value;
  var emphone = form.emphone.value;
  var academyname = form.academyname.value;
  var academyaddress = form.academyaddress.value;
  var academycity = form.academycity.value;
  var academystate = form.academystate.value;
  var academyzip = form.academyzip.value;
  var instructor = form.instructor.value;
  var compete = form.compete.value;
  var beltgi = form.beltgi.value;
  var levelnogi = form.levelnogi.value;
  var division = form.division.value;
  var age = form.age.value;
  var dob = form.dob.value;
  var weight = form.weight.value;
  var paymethod = form.paymethod.value;
  var esignature = form.esignature.value;

  var nameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  var messageRegex = new RegExp(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/?>/gim);
  if(firstname == "") {
    inlineMsg('firstname','Please enter your first name.',2);
    return false;
  }
  if(!firstname.match(nameRegex)) {
    inlineMsg('firstname','Please only enter letters in the first name box.',2);
    return false;
  }
    if(lastname == "") {
    inlineMsg('lastname','Please enter your last name.',2);
    return false;
  }
  if(!lastname.match(nameRegex)) {
    inlineMsg('lastname','Please only enter letters in the last name box.',2);
    return false;
  }
  if(email == "") {
    inlineMsg('email','Please enter your email.',2);
    return false;
  }
  if(!email.match(emailRegex)) {
    inlineMsg('email','Please enter a valid email address.',2);
    return false;
  }
  if(phone == "") {
    inlineMsg('phone','Please enter a phone number.',2);
    return false;
  }
  if(address == "") {
    inlineMsg('address','Please enter your address.');
    return false;
  }

  if(city == "") {
    inlineMsg('city','Please enter your city.',2);
    return false;
  }
  if(state == "") {
    inlineMsg('state','Please select your state.');
    return false;
  }
  if(zip == "") {
    inlineMsg('zip','Please enter your zip code.',2);
    return false;
  }
  if(emfirstname == "") {
    inlineMsg('emfirstname','Please enter the first name of your emergency contact.');
    return false;
  }
  if(emlastname == "") {
    inlineMsg('emlastname','Please enter the last name of your emergency contact.');
    return false;
  }
    if(emphone == "") {
    inlineMsg('emphone','Please enter an emergency contact phone number.',2);
    return false;
  }
  if(academyname == "") {
    inlineMsg('academyname','Please enter your academy or school name.',2);
    return false;
  }
  if(academyaddress == "") {
    inlineMsg('academyaddress','Please enter your academy address.');
    return false;
  }

  if(academycity == "") {
    inlineMsg('academycity','Please enter your academy city.',2);
    return false;
  }
  if(academystate == "") {
    inlineMsg('academystate','Please select your academy state.');
    return false;
  }
  if(academyzip == "") {
    inlineMsg('academyzip','Please enter your zip code.',2);
    return false;
  }
  if(instructor == "") {
    inlineMsg('instructor','Please enter the name of your instructor.',2);
    return false;
  }
  if(compete == "") {
    inlineMsg('compete','Please select the divisions you will compete in.',2);
    return false;
  }
  if(beltgi == "") {
    inlineMsg('beltgi','Please select your belt rank or NONE GI ONLY.',2);
    return false;
  }
  if(levelnogi == "") {
    inlineMsg('levelnogi','Please select your experience level or NONE GI ONLY.',2);
    return false;
  }
  if(division == "") {
    inlineMsg('division','Please select your age division.',2);
    return false;
  }
  if(age == "") {
    inlineMsg('age','Please enter your specific age.',2);
    return false;
  }
   if(dob == "") {
    inlineMsg('dob','Please enter your date of birth.',2);
    return false;
  }
   if(weight == "") {
    inlineMsg('weight','Please enter your weight in lbs.',2);
    return false;
  }
   if(paymethod == "") {
    inlineMsg('paymethod','Please enter your method of payment.',2);
    return false;
  }
   if(esignature == "") {
    inlineMsg('esignature','Electronic signature from a parent or guardian is required. ID will be checked upon entry.',2);
    return false;
  }
  return true;
}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
var MSGHIDE = 3;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide) {
  var msg;
  var msgcontent;
  if(!document.getElementById('msg')) {
    msg = document.createElement('div');
    msg.id = 'msg';
    msgcontent = document.createElement('div');
    msgcontent.id = 'msgcontent';
    document.body.appendChild(msg);
    msg.appendChild(msgcontent);
    msg.style.filter = 'alpha(opacity=0)';
    msg.style.opacity = 0;
    msg.alpha = 0;
  } else {
    msg = document.getElementById('msg');
    msgcontent = document.getElementById('msgcontent');
  }
  msgcontent.innerHTML = string;
  msg.style.display = 'block';
  var msgheight = msg.offsetHeight;
  var targetdiv = document.getElementById(target);
  targetdiv.focus();
  var targetheight = targetdiv.offsetHeight;
  var targetwidth = targetdiv.offsetWidth;
  var topposition = topPosition(targetdiv) - ((msgheight - targetheight) / 2);
  var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
  msg.style.top = topposition + 'px';
  msg.style.left = leftposition + 'px';
  clearInterval(msg.timer);
  msg.timer = setInterval("fadeMsg(1)", MSGTIMER);
  if(!autohide) {
    autohide = MSGHIDE;
  }
  window.setTimeout("hideMsg()", (autohide * 1000));
}

// hide the form alert //
function hideMsg(msg) {
  var msg = document.getElementById('msg');
  if(!msg.timer) {
    msg.timer = setInterval("fadeMsg(0)", MSGTIMER);
  }
}

// face the message box //
function fadeMsg(flag) {
  if(flag == null) {
    flag = 1;
  }
  var msg = document.getElementById('msg');
  var value;
  if(flag == 1) {
    value = msg.alpha + MSGSPEED;
  } else {
    value = msg.alpha - MSGSPEED;
  }
  msg.alpha = value;
  msg.style.opacity = (value / 100);
  msg.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(msg.timer);
    msg.timer = null;
  } else if(value <= 1) {
    msg.style.display = "none";
    clearInterval(msg.timer);
  }
}

// calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
  var left = 0;
  if(target.offsetParent) {
    while(1) {
      left += target.offsetLeft;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.x) {
    left += target.x;
  }
  return left;
}

// calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
  var top = 0;
  if(target.offsetParent) {
    while(1) {
      top += target.offsetTop;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.y) {
    top += target.y;
  }
  return top;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(7,80);
  arrow.src = "images/msg_arrow.gif";
}