// form validation function //
function validate(form) {
  var name = form.name.value;
  var email = form.email.value;
  var pw1 = form.pw1.value;
  var pw2 = form.pw2.value;
  var comp = form.comp.value;
  var phon = form.phon.value;
  var addr = form.addr.value;
  var city = form.city.value;
  var state = form.state.value;
  var zip = form.zip.value;
  var dotnum = form.dotnum.value;
  var nameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  if (email == "") {
      inlineMsg('email', 'Please enter your email address.', 2);
      return false;
  }
  if (!email.match(emailRegex)) {
      inlineMsg('email', '<div id="msgdiv">Please enter a valid email address.<br /><i>Example: user@gmail.com</i></div>', 6);
      return false;
  }
  if(name == "") {
      inlineMsg('name', '<div id="msgdiv">Please enter your name.</div>', 4);
    return false;
}
if (pw1 == "") {
    inlineMsg('pw1', '<div id="msgdiv">Please enter a password.</div>', 4);
    return false;
}
if (pw2 == "") {
    inlineMsg('pw2', '<div id="msgdiv">Please enter a password.</div>', 4);
    return false;
}
if (!name.match(nameRegex)) {
    inlineMsg('name', '<div id="msgdiv">You have entered an invalid name.</div>', 4);
    return false;
}
if (comp == "") {
    inlineMsg('comp', '<div id="msgdiv">What is your company&#39;s name?</div>', 4);
    return false;
}
if (phon == "") {
    inlineMsg('phon', '<div id="msgdiv">Please enter your phone number.</div>', 4);
    return false;
}
if (addr == "") {
    inlineMsg('addr', '<div id="msgdiv">Please enter your mailing address.</div>', 4);
    return false;
}
if (city == "") {
    inlineMsg('city', '<div id="msgdiv">Please enter your city.</div>', 4);
    return false;
}
if (state == "") {
    inlineMsg('state', '<div id="msgdiv">Please enter your state.</div>', 4);
    return false;
}
if (zip == "") {
    inlineMsg('zip', '<div id="msgdiv">Please enter your ZIP code.</div>', 4);
    return false;
}
if (dotnum == "") {
    inlineMsg('dotnum', '<div id="msgdiv">What is your DOT Number?</div>', 4);
    return false;
}
if (pw1 != pw2) {
    inlineMsg('pw2', '<div id="msgdiv">Your passwords do not match.</div>', 5);
    return false;
}
  return true;
}

//function checkPw(form) {
//    pw1 = form.pw1.value;
//    pw2 = form.pw2.value;

//    if (pw1 != pw2) {
//        alert("\nYou did not enter the same new password twice. Please re-enter your password.")
//        return false;
//    }
//    else return true;
//}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
var MSGHIDE = 5;

// 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"; 
}