// function to remove trailing spaces
function trim(str) {
	while (str.charAt(0) == (" ")) {
		str = str.substring(1);
  	}
  	while(str.charAt(str.length-1) == " ") {
		str = str.substring(0,str.length-1);
  	}
  return str;
}
function extractNumber(obj, decimalPlaces, allowNegative)
{
	var temp = obj.value;
	
	// avoid changing things if already formatted correctly
	var reg0Str = '[0-9]*';
	if (decimalPlaces > 0) {
		reg0Str += '\\.?[0-9]{0,' + decimalPlaces + '}';
	} else if (decimalPlaces < 0) {
		reg0Str += '\\.?[0-9]*';
	}
	reg0Str = allowNegative ? '^-?' + reg0Str : '^' + reg0Str;
	reg0Str = reg0Str + '$';
	var reg0 = new RegExp(reg0Str);
	if (reg0.test(temp)) return true;

	// first replace all non numbers
	var reg1Str = '[^0-9' + (decimalPlaces != 0 ? '.' : '') + (allowNegative ? '-' : '') + ']';
	var reg1 = new RegExp(reg1Str, 'g');
	temp = temp.replace(reg1, '');

	if (allowNegative) {
		// replace extra negative
		var hasNegative = temp.length > 0 && temp.charAt(0) == '-';
		var reg2 = /-/g;
		temp = temp.replace(reg2, '');
		if (hasNegative) temp = '-' + temp;
	}
	
	if (decimalPlaces != 0) {
		var reg3 = /\./g;
		var reg3Array = reg3.exec(temp);
		if (reg3Array != null) {
			// keep only first occurrence of .
			//  and the number of places specified by decimalPlaces or the entire string if decimalPlaces < 0
			var reg3Right = temp.substring(reg3Array.index + reg3Array[0].length);
			reg3Right = reg3Right.replace(reg3, '');
			reg3Right = decimalPlaces > 0 ? reg3Right.substring(0, decimalPlaces) : reg3Right;
			temp = temp.substring(0,reg3Array.index) + '.' + reg3Right;
		}
	}
	
	obj.value = temp;
}
function blockNonNumbers(obj, e, allowDecimal, allowNegative)
{
	var key;
	var isCtrl = false;
	var keychar;
	var reg;
		
	if(window.event) {
		key = e.keyCode;
		isCtrl = window.event.ctrlKey
	}
	else if(e.which) {
		key = e.which;
		isCtrl = e.ctrlKey;
	}
	
	if (isNaN(key)) return true;
	
	keychar = String.fromCharCode(key);
	
	// check for backspace or delete, or if Ctrl was pressed
	if (key == 8 || isCtrl)
	{
		return true;
	}

	reg = /\d/;
	var isFirstN = allowNegative ? keychar == '-' && obj.value.indexOf('-') == -1 : false;
	var isFirstD = allowDecimal ? keychar == '.' && obj.value.indexOf('.') == -1 : false;
	
	return isFirstN || isFirstD || reg.test(keychar);
}

function checkUserdetails() {
	var email1 = trim(document.getElementById("email1").value);
	var email2 = trim(document.getElementById("email2").value);
	var email3 = trim(document.getElementById("delemail1").value);
	
	// Check the first name exists
	if (trim(document.getElementById("firstname").value) == "") {
		alert ("Please enter your first name.");
		document.getElementById("firstname").focus();
		return false;
	}
	// Check the surname exists
	if (trim(document.getElementById("surname").value) == "") {
		alert ("Please enter your surname.");
		document.getElementById("surname").focus();
		return false;
	}
	// Check either address line 1 or reg_address line 1 has been entered
	if (trim(document.getElementById("address1").value) == "") {
		alert ("Please enter your address.");
		document.getElementById("address1").focus();
		return false;
	}
	// Check either the town or reg_town has been entered
	if (trim(document.getElementById("town").value) == "") {
		alert ("Please enter your town.");
		document.getElementById("town").focus();
		return false;
	}
	// Check either the county or reg_county has been entered
	if (trim(document.getElementById("county").value) == "") {
		alert ("Please enter your county.");
		document.getElementById("county").focus();
		return false;
	}
	// Check either the post code or reg_postcode has been entered
	if (trim(document.getElementById("postcode").value) == "") {
		alert ("Please enter your postcode.");
		document.getElementById("postcode").focus();
		return false;
	}
	// Check the telephone number exists
	if (trim(document.getElementById("telephone").value) == "") {
		alert ("Please enter your telephone number.");
		document.getElementById("telephone").focus();
		return false;
	}
	// Check email1 exists
	if (email1 == "") {
		alert ("Please enter your email address.");
		document.getElementById("email1").focus();
		return false;
	}
	// Check if email1 is valid
	if (!/^[\w\.\-]+@([a-zA-Z0-9\-]+\.)+[a-zA-Z]{2,4}$/.test(email1)) {
		alert ("Please enter a valid email address.");
		document.getElementById("email1").focus();
		return false;
	}
	// Check email2 exists
	if (email2 == "") {
		alert ("Please re-enter your email address.");
		document.getElementById("email2").focus();
		return false;
	}
	// Check if email2 is valid
	if (!/^[\w\.\-]+@([a-zA-Z0-9\-]+\.)+[a-zA-Z]{2,4}$/.test(email2)) {
		alert ("Please re-enter a valid email address.");
		document.getElementById("email2").focus();
		return false;
	}
	// Check email1 and email2 match
	if (email2 != email1) {
		alert ("The email addresses you entered do not match. Please re-enter them.");
		document.getElementById("email1").focus();
		return false;
	}	
	// If delivery address line 1 is entered, check if other address fielsd have been entered
	if (trim(document.getElementById("deladdress1").value) != "") {
		if (trim(document.getElementById("deltown").value) == "") {
			alert ("Please enter the town for your delivery address.");
			document.getElementById("deltown").focus();
			return false;
		}
	}
	if (trim(document.getElementById("deladdress1").value) != "") {
		if (trim(document.getElementById("delcounty").value) == "") {
			alert ("Please enter the county for your delivery address.");
			document.getElementById("delcounty").focus();
			return false;
		}
	}
	if (trim(document.getElementById("deladdress1").value) != "") {
		if (trim(document.getElementById("delpostcode").value) == "") {
			alert ("Please enter the postcode for your delivery address.");
			document.getElementById("delpostcode").focus();
			return false;
		}
	}
	// If delivery email is entered, check if its valid
	if (email3 != "") {
		if (!/^[\w\.\-]+@([a-zA-Z0-9\-]+\.)+[a-zA-Z]{2,4}$/.test(email3)) {
			alert ("Please re-enter a valid email address.");
			document.getElementById("delemail1").focus();
			return false;
		}
	}
	return true;
}

function checkOrderdetails() {
	// Check if the user has had a quote
	if (!document.getElementById("hadquote").checked && !document.getElementById("hadnoquote").checked) {
	alert ("Have you had a quote from Cypher?");	
	document.getElementById("hadquote").focus();
	return false;
	}
	// If they have had a quote, check they have entered the quote number
	if (document.getElementById("hadquote").checked && trim(document.getElementById("quotenumber").value) == "") {
	alert ("Please enter your quote number.");	
	document.getElementById("quotenumber").focus();
	return false;
	}
	// If they would like a reprint, check they have entered the job number
	if (document.getElementById("reprint").checked && trim(document.getElementById("reprintnumber").value) == "") {
	alert ("Please enter your job number for your reprint.");	
	document.getElementById("reprint").focus();
	return false;
	}
	// Check if quantity 1 exists
	if (trim(document.getElementById("qty1").value) == "") {
		alert ("Please enter the quantity for your 1st item.");
		document.getElementById("qty1").focus();
		return false;
	}
	// Check if description 1 exists
	if (trim(document.getElementById("desc1").value) == "") {
		alert ("Please enter the description for your 1st item.");
		document.getElementById("desc1").focus();
		return false;
	}
	return true;
}

function checkDeliverydetails() {
	// Check if delivery has been chosen
	if (!document.getElementById("collectfromcypher").checked && !document.getElementById("sendbypost").checked) {
		alert ("Please choose your delivery requirements.");	
		document.getElementById("collectfromcypher").focus();
		return false;
	}	
	return true;
}

function checkPaymentdetails() {
	// Check how they would like to pay
	if (!document.getElementById("cashsale").checked && !document.getElementById("accountcustomer").checked && !document.getElementById("governmentbody").checked) {
		alert ("Please choose how you would like to pay.");	
		document.getElementById("cashsale").focus();
		return false;
	}
	return true;
}