// form validation function //
function validate(form) {
  var Fname = document.getElementById('fname').value;
  var Lname = document.getElementById('lname').value;
  var Email = document.getElementById('email').value;
  var Company = document.getElementById('company').value;
  var City = document.getElementById('city').value;
  var State = document.getElementById('state').value;
  var Telephone = document.getElementById('phone').value;
  var Fax = document.getElementById('fax').value;
  var ch1 = document.getElementById('check1').checked;
  var ch2 = document.getElementById('check2').checked;
  var ch3 = document.getElementById('check3').checked;
  var Eventdate = document.getElementById('edate').value;
  var Guests = document.getElementById('guests').value;
  var Message = document.getElementById('message').value;
  var Code = document.getElementById('security_code').value;
  
  var NameRegex = /^([ \u00c0-\u01ffa-zA-Z'\-\.])+$/;      
  var EmailRegex = /^[a-z\d]+([\.\-_][a-z\d]+)*@[a-z\d]+([\.\-_][a-z\d]+)*\.[a-z]{2,5}/i;                  
  var CompanyRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;  
  var CityRegex = /^([ \u00c0-\u01ffa-zA-Z'\-\.])+$/
  var StateRegex = /^([a-zA-z\s]{2,})$/;
  var TelephoneRegex = /(\(\d{3}\))|\d{3}[ \.-]?\d{3}[ \.-]?\d{4}/; 
  var EventdateRegex = /^(((0[1-9]|[12]\d|3[01])\/(0[13578]|1[02])\/((19|[2-9]\d)\d{2}))|((0[1-9]|[12]\d|30)\/(0[13456789]|1[012])\/((19|[2-9]\d)\d{2}))|((0[1-9]|1\d|2[0-8])\/02\/((19|[2-9]\d)\d{2}))|(29\/02\/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$/;
  var GuestsRegex = /[0-9]{1,4}/;
  var MessageRegex = new RegExp(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/?>/gim);
  
  if(Fname == "") {
    inlineMsg('fname','You must enter your first name.',2);
    return false;
  }
  if(!Fname.match(NameRegex)) {
    inlineMsg('fname','You have entered an invalid name.',2);
    return false;
  }
  if(Lname == "") {
    inlineMsg('lname','You must enter your last name.',2);
    return false;
  }
  if(!Lname.match(NameRegex)) {
    inlineMsg('lname','You have entered an invalid name.',2);
    return false;
  }
  if(Email == "") {
    inlineMsg('email','You must enter your email.',2);
    return false;
  }
  if(!Email.match(EmailRegex)) {
    inlineMsg('email','You have entered an invalid email.',2);
    return false;
  }
  if(Company != "" && !Company.match(CompanyRegex)) {
    inlineMsg('company','You have entered an invalid address.',2);
    return false;
  }
  if(City == "") {
    inlineMsg('city','You must enter your city.',2);
    return false;
  }
  if(!City.match(CityRegex)) {
    inlineMsg('city','You have entered an invalid city.',2);
    return false;
  }
  if(State == "") {
    inlineMsg('state','You must enter your State or Province.',2);
    return false;
  }
  if(!State.match(StateRegex)) {
    inlineMsg('state','You have entered an invalid State or Province.',2);
    return false;
  }
  if(Telephone == "") {
    inlineMsg('phone','You must enter your Telephone number.',2);
    return false;
  }
  if(Telephone != "" && !Telephone.match(TelephoneRegex)) {
    inlineMsg('phone','You have entered an invalid telephone number.',2);
    return false;
  }
  if(Fax != "" && !Fax.match(TelephoneRegex)) {
    inlineMsg('fax','You have entered an invalid fax number.',2);
    return false;
  }
  if(ch1 == false && ch2 == false && ch3 == false)  {
	 inlineMsg ('checked','Please select a type of event',2);
	 return false;
  }
   if(Eventdate == "") {
    inlineMsg('edate','You must enter your event date.',2);
    return false;
  }
  if(Eventdate != "" && !Eventdate.match(EventdateRegex)) {
    inlineMsg('edate','You have entered an invalid date.',2);
    return false;
  } 
  if(Guests == "") {
    inlineMsg('guests','You must enter a number of guests.',2);
    return false;
  }
  if(Guests != "" && !Guests.match(GuestsRegex)) {
    inlineMsg('guests','You have entered an invalid number.',2);
    return false;
  }
  if(Message == "") {
    inlineMsg('message','You must enter details of your event.');
    return false;
  }
  if(Message.match(MessageRegex)) {
    inlineMsg('message','You have entered an invalid message.');
    return false;
  }
  if(Code == "") {
    inlineMsg('security_code','You must enter the security code.',2);
    return false;
  }
  
  return true;
}
function CheckTA()
{
  var max=750, 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 = 5;
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;
}

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