// form validation function //
function validate(form) {
  var fname = form.fname.value;
  var lname = form.lname.value;
  var email1 = form.email1.value;
  var email2 = form.email2.value;  
  var phone = form.phone.value;
  var num = form.num.value;
  var nameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  //var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  var emailRegex = /^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/;
  var numRegex = /[0-9]/;
  if(fname == "") {
    inlineMsg('fname','You must enter your first name.',2);
    return false;
  }
  if(lname == "") {
    inlineMsg('lname','You must enter your last name.',2);
    return false;
  }  
  if(!fname.match(nameRegex)) {
    inlineMsg('fname','You have entered an invalid first name.',2);
    return false;
  }
  if(!lname.match(nameRegex)) {
    inlineMsg('lname','You have entered an invalid last name.',2);
    return false;
  }  
  if(email1 == "") {
    inlineMsg('email1','You must enter your email.',2);
    return false;
  }
  if(!email1.match(emailRegex)) {
    inlineMsg('email1','You have entered an invalid email.',2);
    return false;
  }
  if(email2 == "") {
    inlineMsg('email2','You must re-enter your email.',2);
    return false;
  }
  if(!email2.match(emailRegex)) {
    inlineMsg('email2','You have entered an invalid email.',2);
    return false;
  }
  if(email2 !== email1) {
	inlineMsg('email2','Email addresses do not match!',2);
	return false;
  }  
  if(phone == "") {
    inlineMsg('phone','You must enter your phone number.',2);
    return false;
  }
  if(num == "") {
    inlineMsg('num','You must enter the number of IDs.',2);
    return false;
  }
  if(num == "0") {
	inlineMsg('num','You must register at least 1 ID.',2);
	return false;
  }
  if(!num.match(numRegex)) {
    inlineMsg('num','Number of IDs must be a number.',2);
    return false;
  }
  if(num > 10) {
	inlineMsg('num','Number of IDs cannot be more than 10.',2);
	return false;
  }
  return true;
}

// form validation function //
function validate_login(form) {
  var email = form.email.value;
  var password = form.password.value;
  var emailRegex = /^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/;
  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(password == "") {
    inlineMsg('password','You must enter your password.',2);
    return false;
  }*/
  return true;
}

function validatecreate(form) {
  var display = form.display.value;
  var alias = form.alias.value;
  var startdate = form.startdate.value;
  var message_signup = form.message_signup.value;  
  var message_contact = form.message_contact.value;
  var message_howto = form.message_howto.value;
  var site = form.site.value;
  if(display == "") {
    inlineMsg('display','You must enter a name.',2);
    return false;
  }
  if(alias == "") {
    inlineMsg('alias','You must enter an alias.',2);
    return false;
  }
  if(startdate == "") {
    inlineMsg('startdate','This field cannot be left blank.',2);
    return false;
  }  
  if(startdate == "") {
    inlineMsg('startdate','This field cannot be left blank.',2);
    return false;
  }  
  if(message_signup == "") {
    inlineMsg('message_signup','This field cannot be left blank.',2);
    return false;
  }  
  if(message_contact == "") {
    inlineMsg('message_contact','This field cannot be left blank.',2);
    return false;
  }  
  if(message_howto == "") {
    inlineMsg('message_howto','This field cannot be left blank.',2);
    return false;
  } 
  if(site == "" || $site == "http://") {
    inlineMsg('site','This field cannot be left blank.',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 = "http://www.sagedining.com/system/images/msg_arrow.gif"; 
}