var upload_number = 2; 

function addFileInput() { 
	var d = document.createElement("div"); 
	var l = document.createElement("a"); 
	var file = document.createElement("input"); 
	file.setAttribute("type", "file"); file.setAttribute("name", "attachment"+upload_number);
	l.setAttribute("href", "javascript:removeFileInput('f"+upload_number+"');");
	l.appendChild(document.createTextNode("remove"));
   	d.setAttribute("id", "f"+upload_number);
    d.appendChild(file); d.appendChild(l);
	document.getElementById("moreUploads").appendChild(d);
	upload_number++;
}

function removeFileInput(i) { 
	var elm = document.getElementById(i);
 	document.getElementById("moreUploads").removeChild(elm); 
}

function validatecontactus(contactusform) {
  var fname = contactusform.fname.value;
  var gname = contactusform.gname.value;
  var id1 = contactusform.id1.value;
  var email = contactusform.email.value;
  var phone1 = contactusform.phone1.value;
 
  var security_code = contactusform.security_code.value;
 
  var nameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  var contactRegex = /^\(?\d{2}\)?-?\s*\d{8}$/;
  var numberRegex = /^[0-9]/;
  var postalRegex = /^\d{4}$/;

  if(fname == "") {
    inlineMsg('fname','You must enter your family name!',2);
    return false;
  }
  if(!fname.match(nameRegex)) {
    inlineMsg('fname','You have entered an invalid name!',2);
    return false;
  }
  if(gname == "") {
    inlineMsg('gname','You must enter your given name!',2);
    return false;
  }
  if(!gname.match(nameRegex)) {
    inlineMsg('gname','You have entered an invalid name!',2);
    return false;
  }
  if(id1 == "") {
    inlineMsg('id1','What is your date of birth?',2);
    return false;
  }
  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 address!',2);
    return false;
  }
  if(phone1 == "") {
    inlineMsg('phone1','You must enter a contact telephone number including area codes if applicable!',2);
    return false;
  }
  if(!phone1.match(numberRegex)) {
    inlineMsg('phone1','You have entered an invalid number!',2);
    return false;
  }
  if(security_code == "") {
    inlineMsg('security_code','What is the security code?',2);
    return false;
  }
  
  return true;
}

function chechExtension()
		{
			var extString = document.contactusform.attachment.value;
			if(extString == "")
			{
				return true;
			}
			else
			{
				var position = extString.lastIndexOf(".");
				var ext = extString.substring(position);
				if (ext == ".txt" || ext == ".doc" || ext == ".pdf" || ext == ".docx")
				{
					return true;
				}
				else
				{
					return false;
				}
			}
		}

// 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 * 2000));
}

// 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;
}