// form validation for contact function //
function validateForm(form) {
  var attend = form.attending.value;
  var email = form.email.value;
  var fname = form.fname.value;
  var lname = form.lname.value;
  var address = form.address.value;
  var city = form.city.value;
  var state = form.state.value;
  var zip = form.zip.value;
  var attending = form.attending.value;
  if (form.elements.ctype != null)
  {
	  var ctype = form.elements.ctype;
	  var cnum = form.cnum.value;
	  var expire = form.expire.value;
	  var cvc = form.cvc.value;
	  var ccSelect = document.getElementById('ccSelect');
  }
  if (form.promo != null)
  {
	  
  	var promo = form.promo.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(email == '') {
    inlineMsg('email','Please enter an email address.',2);
    return false;
  }
  if(!email.match(emailRegex) && !emailCheck(email)) {
    inlineMsg('email','Please enter a valid email address.',2);
    return false;
  }
  if(fname == '') {
    inlineMsg('fname','Please enter your first name.',2);
    return false;
  }
  if(lname == '') {
    inlineMsg('lname','Please enter your last name.',2);
    return false;
  }
  if(address == '') {
    inlineMsg('address','Please enter your billing address.',2);
    return false;
  }
  if(city == '') {
    inlineMsg('city','Please enter your city.',2);
    return false;
  }
  if(state == '') {
    inlineMsg('state','Please enter your state.',2);
    return false;
  }
  if(zip == '') {
    inlineMsg('zip','Please enter your zip.',2);
    return false;
  } else if (!isZip(zip)){
    inlineMsg('zip','Please enter a valide zip code.',2);
    return false;
  }
  
  if(ctype != null) {
	  if(ctype[0].checked == false && ctype[1].checked == false && ctype[2].checked == false) {
		inlineMsg('ccSelect','Please enter your type of credit card.',2);
		return false;
	  }
  }
  if(cnum != null) {
	if(cnum == '') {
		inlineMsg('cnum','Please enter your credit card number.',2);
		return false;
	} else {
		if(!cardval(cnum)){
			inlineMsg('cnum','Your credit card number is invalid.',2);
			return false;
		}
	
	}
		
  }
  if(expire != null) {
	  if(expire == '') {
		inlineMsg('expire','Please enter your credit card expiration.',2);
		return false;
	  }
  }
  if(cvc != null) {
	  if(cvc == '') {
		inlineMsg('cvc','Please enter your credit card cvc.',2);
		return false;
	  }
  }
  if(promo != null) {
	  if(promo == '') {
		inlineMsg('promo','Please enter your promo code.',2);
		return false;
	  }
  }
  return true;
  //processReg(trans);
}

function validate(form) {
  var email = form.email.value;
  var fname = form.fname.value;
  var lname = form.lname.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(email == '') {
    inlineMsg('email','Please enter an email address.',2);
    return false;
  }
  if(!email.match(emailRegex) && !emailCheck(email)) {
    inlineMsg('email','Please enter a valid email address.',2);
    return false;
  }
  if(fname == '') {
    inlineMsg('fname','Please enter your first name.',2);
    return false;
  }
  if(lname == '') {
    inlineMsg('lname','Please enter your last name.',2);
    return false;
  }
  return true;
  
}

function cardval(s) {
	// remove non-numerics
	var v = "0123456789";
	var w = "";
	for (i=0; i < s.length; i++) {
	x = s.charAt(i);
	if (v.indexOf(x,0) != -1)
	w += x;
	}
	// validate number
	j = w.length / 2;
	if (j < 6.5 || j > 8 || j == 7) return false;
	k = Math.floor(j);
	m = Math.ceil(j) - k;
	c = 0;
	for (i=0; i<k; i++) {
	a = w.charAt(i*2+m) * 2;
	c += a > 9 ? Math.floor(a/10 + a%10) : a;
	}
	for (i=0; i<k+m; i++) c += w.charAt(i*2+1-m) * 1;
	return (c%10 == 0);
}

function isZip(s) 
{

     // Check for correct zip code
     reZip = new RegExp(/(^\d{5}$)|(^\d{5}-\d{4}$)/);

     if (!reZip.test(s)) {
          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();
  targetdiv.style.border = '2px solid #b03d0c';
  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"; 
}

function emailCheck (emailStr) {

	var checkTLD=1;
	
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	
	var emailPat=/^(.+)@(.+)$/;
	
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	
	var validChars="\[^\\s" + specialChars + "\]";
	
	var quotedUser="(\"[^\"]*\")";
	
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	
	var atom=validChars + '+';
	
	var word="(" + atom + "|" + quotedUser + ")";
	
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	
	var matchArray=emailStr.match(emailPat);
	
	if (matchArray==null) {
		
		return false;
	}
	
	var user=matchArray[1];
	var domain=matchArray[2];
	
	for (i=0; i<user.length; i++) {
		
		if (user.charCodeAt(i)>127) {
			
			return false;
			
		}
		
	}
	
	for (i=0; i<domain.length; i++) {
		
		if (domain.charCodeAt(i)>127) {
			
			return false;
			
		}
		
	}
	
	if (user.match(userPat)==null) {
		
		return false;
		
	}
	
	var IPArray=domain.match(ipDomainPat);
	
	if (IPArray!=null) {
		
		for (var i=1;i<=4;i++) {
			
			if (IPArray[i]>255) {
		
			return false;
			
		   }
		   
		}
		
		return true;
	}
	
	var atomPat=new RegExp("^" + atom + "$");
	
	var domArr=domain.split(".");
	
	var len=domArr.length;
	
	for (i=0;i<len;i++) {
		
		if (domArr[i].search(atomPat)==-1) {
			
			return false;
			
	   }
	   
	}
	
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
		
		return false;
		
	}
	
	if (len<2) {
		
		return false;
		
	}
	
	return true;
	
}