// form validation function //
function validate(form) {
  var fname = form.First_Name.value;
  var sname = form.Surname.value;
  var email = form.Email.value;
  var address = form.Address.value;
  var Suburb = form.Suburb.value;
  var Postcode = form.Postcode.value;
  var Donate_as = form.Donate_as.value;
  var Organisation = form.Organisation.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(fname == "") {
    inlineMsg('First_Name','Please enter your first name.',2);
    return false;
  }

  if(sname == "") {
    inlineMsg('Surname','Please enter your surname.',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.',2);
    return false;
  }
   if(address == "") {
    inlineMsg('Address','Please enter your address.');
    return false;
  }
  if(Suburb == "") {
    inlineMsg('Suburb','Please enter your suburb.',2);
    return false;
  }
  if(Postcode == "") {
    inlineMsg('Postcode','Please enter your Postcode.',2);
    return false;
  }
  if(Donate_as == "") {
    inlineMsg('Donate_as','Please select.');
    return false;
  }
  if(Donate_as=="Organisation" && Organisation == "") 
  { 
        inlineMsg('Organisation/Company','Please enter Organisation/Company name.');
        return false;
  }


  return true;
}

//validate credit card
function validate_cc(form) {

  var cc_holder = form.cc_holder.value;
  var cc_type = form.cc_type.value;
  var cc_number = form.cc_number.value;
  var expiry_Date_m = form.expiry_Date_m.value;
  var expiry_Date_y = form.expiry_Date_y.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);
  var numRegex = /^\d+\s*\d+\s*\d+\s*\d+\s*$/;

  if(cc_holder == "") {
    inlineMsg('cc_holder','Please enter credit card holder name.',2);
    return false;
  }

  if(cc_type == "") {
    inlineMsg('cc_type','Please select credit card type.',2);
    return false;
  }
  
  if(cc_number == "") {
    inlineMsg('cc_number','Please enter credit card number.',2);
    return false;
  }
  if(!cc_number.match(numRegex)) {
    inlineMsg('cc_number','Please enter a valid credit card number.',2);
    return false;
  }
 
  if(expiry_Date_m == "") {
    inlineMsg('expiry_Date_m','Please select credit card expiry month.');
    return false;
  }
  if(expiry_Date_y == "") {
    inlineMsg('expiry_Date_y','Please select credit card expiry year.');
    return false;
  }

  return true;
}

//validate donation amount
function validate_amount(form) {
  var amount = form.amount.value;
  var numRegex = /^\d+(.\d+)?$/;
  var messageRegex = new RegExp(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/?>/gim);

  if(amount == "") {
    inlineMsg('amount','Please enter how much you want to donate.',2);
    return false;
  }

  if(amount == "0") {
    inlineMsg('amount','Please enter a number greater than 0.',2);
    return false;
  }
  
  if(!amount.match(numRegex)) {
    inlineMsg('amount','Please enter a number.',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 = "components/com_donate/images/msg_arrow.gif"; 
}

function HideChange(d) {

	
	if (d != "Individual")
	   {
	     document.getElementById('ABN_h').style.display = "block";
	     document.getElementById('Organisation_h').style.display = "block";
	   }
	else
	   {
	     document.getElementById('ABN_h').style.display = "none";
	     document.getElementById('Organisation_h').style.display = "none";
	   }
}
function ShowContent(d) {
if(d.length < 1) { return; }
var dd = document.getElementById(d);
AssignPosition(dd);
dd.style.display = "block";
}