// form validation function //
function validate(form) {
	
// General Contact Information	
  var first = form.first.value;
  var last = form.last.value;
  var address = form.address.value;
  var city = form.city.value;
  var state = form.state.value;
  var zip = form.zip.value;
  var phone = form.phone.value; 
  var email = form.email.value; 
  var give = form.giverType.value;
  
// Gift Allocation 
  var firstlevel = form.firstlevel.value;
  var secondlevel =form.secondlevel.value;
 
// Credit Card Information
  var CCtype = form.CCtype.value;
  var CCfirst = form.CCfirst.value;
  var CClast = form.CClast.value;
  var CCnumber = form.CCnumber.value;
  var CCexpire = form.CCexpire.value;
  var CCamount = form.CCamount.value;
 

  
// Regular Expression Validation
  var nameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  var creditRegex = /^((4\d{3})|(5[1-5]\d{2})|(6011)|(3[68]\d{2})|(30[012345]\d))[ -]?(\d{4})[ -]?(\d{4})[ -]?(\d{4}|3[4,7]\d{13})$/;
  
  
  /////////////////////////////////////////////////
  // ---------  GENERAL INFORMATION
  /////////////////////////////////////////////////

  if(first == "") {
    inlineMsg('first','Please enter your first name.',2);
    return false;
  }
  if (nameRegex.test(first) != true) {
	 inlineMsg('first','Please use valid characters.',2);
    return false;
  }
  if(last == "") {
    inlineMsg('last','Please enter your last name.',2);
    return false;
  }
  if (nameRegex.test(last) != true) {
	 inlineMsg('last','Please use valid characters.',2);
    return false;
  }
  if(address == "") {
    inlineMsg('address','Please enter your address.',2);
    return false;
  }
  if(city == "") {
    inlineMsg('city','Please enter your city.',2);
    return false;
  }
  if (nameRegex.test(city) != true) {
	 inlineMsg('city','Please use valid characters.',2);
    return false;
  }
  if(state == "") {
    inlineMsg('state','Please enter your state.',2);
    return false;
  }
  if (nameRegex.test(state) != true) {
	 inlineMsg('state','Please use valid characters.',2);
    return false;
  }
  if(zip == "") {
    inlineMsg('zip','Please enter your zip.',2);
    return false;
  }
  if(phone == "") {
    inlineMsg('phone','Please enter your phone.',2);
    return false;
  }
  if(email == "") {
    inlineMsg('email','Please enter your phone.',2);
    return false;
  }
  if (emailRegex.test(email) != true) {
	 inlineMsg('email','Please use valid characters.',2);
    return false;
  }
  if(give == "") {
    inlineMsg('giverType','Please identify yourself.',2);
    return false;
  }
  
  /////////////////////////////////////////////////
  // ---------  GIFT ALLOCATION
  /////////////////////////////////////////////////
  
  if(firstlevel == "") {
    inlineMsg('firstlevel','Please tell us where you would like your gift to go.',2);
    return false;
  }
  if(firstlevel == "Scholarships:" && secondlevel == "") {
    inlineMsg('secondlevel','Please tell us where you would like your gift to go.',2);
    return false;
  }
  if(firstlevel == "Athletics:" && secondlevel == "") {
    inlineMsg('secondlevel','Please tell us where you would like your gift to go.',2);
    return false;
  }
  
   /////////////////////////////////////////////////
  // ---------  CREDIT CARD INFORMATION
  /////////////////////////////////////////////////
  if(CCtype == "") {
    inlineMsg('CCtype','Please specify card type.',2);
    return false;
  }
  if(CCfirst == "") {
    inlineMsg('CCfirst','Please enter cardholder\'s first name.',2);
    return false;
  }
  if(CClast == "") {
    inlineMsg('CClast','Please enter cardholder\'s last name.',2);
    return false;
  }
  if(CCnumber == "") {
    inlineMsg('CCnumber','Please enter credit card number.',2);
    return false;
  }
  if (creditRegex.test(CCnumber) != true) {
	 inlineMsg('CCnumber','Invalid credit card number.',2);
    return false;
  }
  if(CCexpire == "") {
    inlineMsg('CCexpire','Please enter expiration date.',2);
    return false;
  }
  if(CCamount == "") {
    inlineMsg('CCamount','Please enter gift amount.',2);
    return false;
  }

  alert("sent successfully");
  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 = "images/msg_arrow.gif"; 
}