// form validation function //


function checkLuhn(input)
{
  var sum = 0;
  var numdigits = input.length;
  var parity = numdigits % 2;
  for(var i=0; i < numdigits; i++) {
    var digit = parseInt(input.charAt(i))
    if(i % 2 == parity) digit *= 2;
    if(digit > 9) digit -= 9;
    sum += digit;
  }
  return (sum % 10) == 0;
}



function validate(form) {
	var customername = form.customername.value;
	var shippingaddress = form.shippingaddress.value;
    var shippingcity = form.shippingcity.value;
    var shippingstate = form.shippingstate.value;
    var shippingzip = form.shippingzip.value;  
	var phone = form.phone.value;
	var email = form.email.value;
  	var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  	var principle = form.principle.value;
	  
	  
	var creditcardtype = form.creditcardtype.value;
    var creditcardname = form.creditcardname.value;
    var creditcardnumber = form.creditcardnumber.value;
    var creditcardmonth = form.creditcardmonth.value;
    var creditcardyear = form.creditcardyear.value;  
	var creditcardcode = form.creditcardcode.value; 
	 
	var bank = form.bank.value;
    var accountname = form.accountname.value;  
	var accounttype = form.accounttype.value;  
	var accountnumber = form.accountnumber.value;  
	var routingnumber = form.routingnumber.value; 
	  
	var certname = form.certname.value;
	var trackingquantity = form.trackingquantity.value;
	var trackingquantityRegex = /^[0-9]*$/;
  
	if(customername == "") {
	inlineMsg('error','You Must Enter Company Name',2);
	return false;
	}

	if(shippingaddress == "") {
	inlineMsg('error','You Must Enter Your Shipping Address',2);
	return false;
	}
    if(shippingcity == "") {
	inlineMsg('error','You Must Enter Your Shipping City',2);
	return false;
	}
    if(shippingstate == "") {
	inlineMsg('error','You Must Enter Your Shipping State',2);
	return false;
	}
    if(shippingzip == "") {
	inlineMsg('error','You Must Enter Your Shipping Zip',2);
	return false;
	}    

	if(phone == "") {
	inlineMsg('error','You Must Enter Your Phone Number',2);
	return false;
	}

	
	if(email == "") {
	inlineMsg('error','You Must Enter Your Email',2);
	return false;
	}
	if(!email.match(emailRegex)) {
	inlineMsg('error','You Have Entered An Invalid Email',2);
	return false;
	}


	if(principle == "") {
	inlineMsg('error','You Must Enter Principal/Partner/Officer',2);
	return false;
	}

	if ( ( form.paymentmethod[0].checked == false )
	  && ( form.paymentmethod[1].checked == false ) 
	  )
	{
	  inlineMsg('error','Please Choose A Method Of Payment',2);
	  return false;
	}
	  
	  
	  
	if (( form.paymentmethod[0].checked == true ) && (creditcardtype == "")) {
    inlineMsg('error','You Must Choose Your Credit Card Type.',2);
    return false;
    }
    if (( form.paymentmethod[0].checked == true ) && (creditcardnumber == "")) {
    inlineMsg('error','You Must Enter A Valid Credit Card Number.',2);
    return false;
    }
    if (( form.paymentmethod[0].checked == true ) && (creditcardname == "")) {
    inlineMsg('error','You Must Enter Your Credit Card Name.',2);
    return false;
    }
  
    if (( form.paymentmethod[0].checked == true ) && (creditcardmonth == "")) {
    inlineMsg('error','You Must Enter Your Credit Card Month.',2);
    return false;
    }
    if (( form.paymentmethod[0].checked == true ) && (creditcardyear == "")) {
    inlineMsg('error','You Must Enter Your Credit Card Year.',2);
    return false;
    }
	if (( form.paymentmethod[0].checked == true ) && (creditcardcode == "")) {
    inlineMsg('error','You Must Enter Your Credit Card Code.',2);
    return false;
    }   
	 
	  
	if (( form.paymentmethod[1].checked == true ) && (bank == "")) {
    inlineMsg('error','You Must Enter Your Bank Name.',2);
    return false;
    }
    if (( form.paymentmethod[1].checked == true ) && (accountname == "")) {
    inlineMsg('error','You Must Enter Your Account Name.',2);
    return false;
    }  
      
	if (( form.paymentmethod[1].checked == true ) && (accounttype == "")) {
    inlineMsg('error','You Must Enter Your Account Tyoe.',2);
    return false;
    } 
	  
	  
	if (( form.paymentmethod[1].checked == true ) && (routingnumber == "")) {
    inlineMsg('error','You Must Enter Your Routing Number.',2);
    return false;
    }   
	if (( form.paymentmethod[1].checked == true ) && (accountnumber == "")) {
    inlineMsg('error','You Must Enter Your Account Number.',2);
    return false;
    }  
	


	if(certname == "") {
	inlineMsg('error','You Must Type In Your Name As A Signature',2);
	return false;
	}


	if(trackingquantity == "") {
    inlineMsg('error','You Must Enter Tracking Quantity',2);
    return false;
    }

    if(!trackingquantity.match(trackingquantityRegex)) {
    inlineMsg('error','You Must Enter An Integer In Tracking Quantity',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 * 1500));
}

// 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="#registerPath#images/msg_arrow.gif"; 
}