// FORM VALIDATION FUNCTION //
function validate(form)
{
	var f = form;
	var firstname = f["FirstName"].value;
	var surname = f["Surname"].value;
	var email = f["Email"].value;
	var phone = f["PhoneNumber"].value;		
	var address = f["Address"].value;
	var city = f["City"].value;
	var stateCode = f["stateCode"].value;
	var postcode = f["Postcode"].value;
	var enquiry = f["Enquiry"].value;
 
  	var firstnameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  	var surnameRegex = /^[a-zA-Z]+(([\'\,\.\- ][a-zA-Z ])?[a-zA-Z]*)*$/;
  	var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
  	var enquiryRegex = new RegExp(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/?>/gim);

  	if (firstname == "")
  	{
    	inlineMsg('firstname','Required.',2);
    	return false;
  	}

  	if (!firstname.match(firstnameRegex))
  	{
    	inlineMsg('firstname','Please review.',2);
    	return false;
  	}

  	if (surname == "")
  	{
    	inlineMsg('surname','Required.',2);
    	return false;
  	}

  	if (!surname.match(surnameRegex))
  	{
    	inlineMsg('surname','Please review.',2);
    	return false;
  	}

  	if (email == "")
  	{
    	inlineMsg('email','Required.',2);
    	return false;
  	}

  	if (!email.match(emailRegex))
  	{
    	inlineMsg('email','Please review.',2);
    	return false;
  	}

	/*
  	if (phone == "")
  	{
    	inlineMsg('phone','Required.',2);
    	return false;
  	}

  	if (address == "")
  	{
    	inlineMsg('address','Required.',2);
    	return false;
  	}

  	if (city == "")
  	{
    	inlineMsg('city','Required.',2);
    	return false;
  	}

  	if (stateCode == "")
  	{
    	inlineMsg('stateCode','Required.',2);
    	return false;
  	}
  	
  	if (postcode == "")
  	{
    	inlineMsg('postcode','Required.',2);
    	return false;
  	}
  	*/

  	if (enquiry == "")
  	{
    	inlineMsg('enquiry','Required.');
    	return false;
  	}

  	if (enquiry.match(enquiryRegex))
  	{
    	inlineMsg('enquiry','Please review.');
    	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 = "images/msg_arrow.gif"; 
}

// VALIDATE SEARCH //
function validateSearch(f)
{
	if (f.OEMPartNumber.value == '' && f.TurboPartNumber.value == '' && f.ServiceTurboNumber.value == '')
	{
		window.alert('Please enter a Part Number.');
		return false;
	}
	
	if (f.OEMPartNumber.value != '' && f.TurboPartNumber.value != '')
	{
		window.alert('For more accurate results, please search on either an OEM Part Number or a Schwitzer Part Number.'); 
		return false;
	}

	if (f.OEMPartNumber.value != '' && f.ServiceTurboNumber.value != '')
	{
		window.alert('For more accurate results, please search on either an OEM Part Number or a Schwitzer Part Number.'); 
		return false;
	}

	return true;
}

// COPY DETAILS //
function CopyDetails()
{
	document.orderform.shippingAddress.value = document.orderform.address.value;
	document.orderform.shippingCity.value = document.orderform.city.value;
	document.orderform.shippingStateCode.value = document.orderform.stateCode.value;
	document.orderform.shippingZip.value = document.orderform.zip.value;
}