// form validation function //
function validate(form) {
  var salutation = form.salutation.value;
  var name = form.name.value;

  var ic = form.ic.value;
  var address = form.address.value;  
  var city = form.city.value;  
  var state  = form.state.value;    
  var postcode = form.postcode.value;    
  var contact1 = form.contact1.value;  
  var contact2 = form.contact2.value;    
  var email = form.email.value;
  var email2 = form.email2.value;
  
  var password = form.password.value;
  var password2 = form.password2.value;
  
  var randomCode = form.randomCode.value;
  var contactRegex = /^[0-9]*$/;  
  var nameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  var messageRegex = new RegExp(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/?>/gim);
  
    if(salutation == "") {
    inlineMsg('salutation','<strong>Error</strong><br />You must select your salutation.',2);
    return false;
  }
  
  if(name == "") {
    inlineMsg('name','You must enter your name.');
    return false;
  }
  
  if(!name.match(nameRegex)) {
    inlineMsg('name','You have entered an invalid name.',2);
    return false;
  }

  
  if(ic == "") {
    inlineMsg('ic','You must enter your IC number.',2);
    return false;
  }
  
  if(address == "") {
    inlineMsg('address','You must enter your Address.',2);
    return false;
  }    
  
  if(city == "") {
    inlineMsg('city','You must enter your City.',2);
    return false;
  }    
  
  if(state == "") {
    inlineMsg('state','You must enter your State.',2);
    return false;
  }      
  
  if(contact1 == "") {
    inlineMsg('contact1','You must enter your Contact number.',2);
    return false;
  }  
  
  if(!contact1.match(contactRegex)) {
    inlineMsg('contact1','<strong>Error</strong><br />Please enter only digits (0-9).',2);
    return false;
  }  
  
    if(!contact2.match(contactRegex)) {
    inlineMsg('contact2','<strong>Error</strong><br />You have entered an invalid contact number.',2);
    return false;
  }  
    

  
  if(email == "") {
    inlineMsg('email','<strong>Error</strong><br />You must enter your email.',2);
    return false;
  }
  
  if(email2 == "") {
    inlineMsg('email2','<strong>Error</strong><br />You must enter your email.',2);
    return false;
  }
  
  if(email != email2) {
    inlineMsg('email2','<strong>Error</strong><br />Please re-enter your email again.',2);
    return false;
  }  
  

  if(!email.match(emailRegex)) {
    inlineMsg('email','<strong>Error</strong><br />You have entered an invalid email.',2);
    return false;
  }
  
  
    if(password == "") {
    inlineMsg('password','<strong>Error</strong><br />You must enter a password.',2);
    return false;
  }
  
  if(password2 == "") {
    inlineMsg('password2','<strong>Error</strong><br />You must enter a password.',2);
    return false;
  }
  
  if(password != password2) {
    inlineMsg('password2','<strong>Error</strong><br />Please re-enter your password again.',2);
    return false;
  }  
  
  
  

  if(randomCode == "") {
    inlineMsg('randomCode','You must enter a verification code.',2);
    return false;
  }
  

  

  

  return true;
}





// START OF MESSAGE SCRIPT //

var MSGTIMER = 2;
var MSGSPEED = 5;

//@MSGOFFSET : Specify the displacement px to the right  of the input box
// e.g. MSGOFFSET= 1 ,    [____] [1 px] [Message]
// e.g. MSGOFFSET= 1000 ,    [____] [                                            1000 px                                      ] [Message]
var MSGOFFSET = 3;

//@MSGHIDE : Specify the time to autohide
// can be overwritten at function call
// e.g. MSGHIDE=0, do not hide
// e.g. MSGHIDE=5, hide in 5 secs
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"; 
}