function validate(form) {
  var Email = document.getElementById('Email').value;
  var FirstName = document.getElementById('FirstName').value;
  var LastName = document.getElementById('LastName').value;
  var City = document.getElementById('City').value;
  var Address = document.getElementById('Address').value;
  var Zip = document.getElementById('Postal').value;
  var Telephone = document.getElementById('Telephone').value;
  var Car = document.getElementById('choose_a_new_car').value;
  var admonth = document.getElementById('ADmonth').value;
  var adday = document.getElementById('ADday').value;
  var adyear = document.getElementById('ADyear').value;
  var adhour = document.getElementById('ATH').value;
  var admin = document.getElementById('ATM').value;
  var dpmonth = document.getElementById('DPmonth').value;
  var dpday = document.getElementById('DPday').value;
  var dpyear = document.getElementById('DPyear').value;
  var dphour = document.getElementById('DPH').value;
  var dpmin = document.getElementById('DPM').value;
  var Code = document.getElementById('security_code').value;
  
  var NameRegex = /^([ \u00c0-\u01ffa-zA-Z'\-\.])+$/; 
  var EmailRegex = /^[a-z\d]+([\.\-_][a-z\d]+)*@[a-z\d]+([\.\-_][a-z\d]+)*\.[a-z]{2,5}/i;                  
  var TelephoneRegex = /(\(\d{3}\))|\d{3}[ \.-]?\d{3}[ \.-]?\d{4}/; 
  var AddressRegex = /^[0-9]+\s+([a-zA-Z\d\.\- ]+|[a-zA-Z]+\s[a-zA-Z]+)$/;
  var CityRegex = /^([ \u00c0-\u01ffa-zA-Z'\-\.])+$/; 
  var ZipRegex = /^\d{5}-\d{4}|\d{5}|[a-zA-Z]\d{1}[a-zA-Z](\-| |)\d{1}[a-zA-Z]\d{1}$/; 
  
  if(Email == "") {
    inlineMsg('Email','YOU MUST ENTER YOUR EMAIL ADDRESS.',2);
    return false;
  }
  if(!Email.match(EmailRegex)) {
    inlineMsg('Email','YOU HAVE ENTERED AN INVALID EMAIL.',2);
    return false;
  }
  if(FirstName == "") {
    inlineMsg('FirstName','YOU MUST ENTER YOUR FIRST NAME.',2);
    return false;
  }
  if(!FirstName.match(NameRegex)) {
    inlineMsg('FirstName','YOU HAVE ENTERED AN INVALID NAME.',2);
    return false;
  }
  if(LastName == "") {
    inlineMsg('LastName','YOU MUST ENTER YOUR LAST NAME.',2);
    return false;
  }
  if(!LastName.match(NameRegex)) {
    inlineMsg('LastName','YOU HAVE ENTERED AN INVALID NAME.',2);
    return false;
  }
  if(City != "" && !City.match(NameRegex)) {
    inlineMsg('City','YOU HAVE ENTERED AN INVALID CITY.',2);
    return false;
  }
  if(Address != "" && !Address.match(AddressRegex)) {
    inlineMsg('Address','YOU HAVE ENTERED AN INVALID ADDRESS.',2);
    return false;
  } 
  if(Zip != "" && !Zip.match(ZipRegex)) {
    inlineMsg('Postal','YOU HAVE ENTERED AN INVALID POSTAL/ZIP CODE.',2);
    return false;
  }   
  if(Telephone == "") {
    inlineMsg('Telephone','YOU MUST ENTER YOUR PHONE NUMBER.',2);
    return false;
  }
  if(Telephone != "" && !Telephone.match(TelephoneRegex)) {
    inlineMsg('Telephone','YOU HAVE ENTERED AN INVALID NUMBER.',2);
    return false;
  }  
  if(Car == "---")
  {
	 inlineMsg('choose_a_new_car','YOU MUST CHOOSE A CAR.',2);
     return false;
  }
  if(dpmonth == "---")
  {
	 inlineMsg('DPyear','YOU MUST CHOOSE AN DEPARTURE MONTH.',2);
     return false;
  }
  if(dpday == "---")
  {
	 inlineMsg('DPyear','YOU MUST CHOOSE AN DEPARTURE DAY.',2);
     return false;
  }
  if(dpyear == "---")
  {
	 inlineMsg('DPyear','YOU MUST CHOOSE AN DEPARTURE YEAR.',2);
     return false;
  }
  if(dphour == "---")
  {
	 inlineMsg('DPM','YOU MUST CHOOSE AN DEPARTURE HOUR.',2);
     return false;
  }
  if(dpmin == "---")
  {
	 inlineMsg('DPM','YOU MUST CHOOSE AN DEPARTURE MINUTE.',2);
     return false;
  }
  if(admonth == "---")
  {
	 inlineMsg('ADyear','YOU MUST CHOOSE AN ARRIVAL MONTH.',2);
     return false;
  }
  if(adday == "---")
  {
	 inlineMsg('ADyear','YOU MUST CHOOSE AN ARRIVAL DAY.',2);
     return false;
  }
  if(adyear == "---")
  {
	 inlineMsg('ADyear','YOU MUST CHOOSE AN ARRIVAL YEAR.',2);
     return false;
  }
  if(adhour == "---")
  {
	 inlineMsg('ATM','YOU MUST CHOOSE AN ARRIVAL HOUR.',2);
     return false;
  }
  if(admin == "---")
  {
	 inlineMsg('ATM','YOU MUST CHOOSE AN ARRIVAL MINUTE.',2);
     return false;
  }
  if(Code == "") {
    inlineMsg('security_code','YOU MUST ENTER THE SECURITY CODE.',2);
    return false;
  }
  return true;
}

function CheckTA()
{
  var max=250, texthalt;

  texthalt=document.getElementById('Message').value;

  if (texthalt.length >= max)
	{
	document.getElementById('Message').value=texthalt.substring(0,max);
	document.getElementById('Message').value.blur();
	}
}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 4;
var MSGOFFSET = 4;
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;
}