function echeck(str) {

	var at = "@";
	var dot = ".";
	var lat = str.indexOf(at);
	var lstr = str.length;
	var ldot = str.indexOf(dot);
	
	if (str.indexOf(at) ==- 1) { return false; }
	if (str.indexOf(at) ==- 1 || str.indexOf(at) == 0 || str.indexOf(at) == lstr) { return false; }
	if (str.indexOf(dot) ==- 1 || str.indexOf(dot) == 0 || str.indexOf(dot) == lstr) { return false; }
	if (str.indexOf(at, (lat + 1)) !=- 1) { return false; }
	if (str.substring(lat - 1, lat) == dot || str.substring(lat + 1, lat + 2) == dot) { return false; }
	if (str.indexOf(dot, (lat + 2)) ==- 1) { return false; }
	if (str.indexOf(" ") !=- 1 ) { return false; }
	 
	return true;
}

function key(number) {
	return Math.floor(Math.random() * number);
}

function validate_checkout() {
	
	// first_name
	if (document.getElementById("first_name").value.length < 1) {
		alert("Please enter a valid first name.");
		document.getElementById("first_name_label").style.color = "red";
		document.getElementById("first_name").focus();
		return false;
	} else {
		document.getElementById("first_name_label").style.color = "black";
	}
	
	// last_name
	if (document.getElementById("last_name").value.length < 1) {
		alert("Please enter a valid last name.");
		document.getElementById("last_name_label").style.color = "red";
		document.getElementById("last_name").focus();
		return false;
	} else {
		document.getElementById("last_name_label").style.color = "black";
	}
	
	// email_1 (validate)
	if (echeck(document.getElementById("email_1").value) == false) {
		alert("Please enter a valid email address.");
		document.getElementById("email_1_label").style.color = "red";
		document.getElementById("email_1").focus();
		return false;
	} else {
		document.getElementById("email_1_label").style.color = "black";
	}
	
	// email_2
	if (document.getElementById("email_2").value != document.getElementById("email_1").value) {
		alert("Please make sure the email addresses are the same.");
		document.getElementById("email_2_label").style.color = "red";
		document.getElementById("email_2").focus();
		return false;
	} else {
		document.getElementById("email_2_label").style.color = "black";
	}
	
	// street_address
	if (document.getElementById("street").value.length < 1) {
		alert("Please enter a valid street address.");
		document.getElementById("street_label").style.color = "red";
		document.getElementById("street").focus();
		return false;
	} else {
		document.getElementById("street_label").style.color = "black";
	}
	
	// town
	if (document.getElementById("town").value.length < 1) {
		alert("Please enter a valid town.");
		document.getElementById("town_label").style.color = "red";
		document.getElementById("town").focus();
		return false;
	} else {
		document.getElementById("town_label").style.color = "black";
	}
	
	// province
	if (document.getElementById("province").value.length < 1) {
		alert("Please enter a valid province.");
		document.getElementById("province_label").style.color = "red";
		document.getElementById("province").focus();
		return false;
	} else {
		document.getElementById("province_label").style.color = "black";
	}
	
	// postal_code
	if (document.getElementById("postal_code").value.length < 1) {
		alert("Please enter a valid postal code.");
		document.getElementById("postal_code_label").style.color = "red";
		document.getElementById("postal_code").focus();
		return false;
	} else {
		document.getElementById("postal_code_label").style.color = "black";
	}
	
	// phone
	if (document.getElementById("phone").value.length < 1) {
		alert("Please enter a valid telephone number.");
		document.getElementById("phone_label").style.color = "red";
		document.getElementById("phone").focus();
		return false;
	} else {
		document.getElementById("phone_label").style.color = "black";
	}
	
	/*// shipping_method
	if (document.getElementById("shipping_method").value == 'select') {
		alert("Please select a shipping method.");
		document.getElementById("shipping_method_label").style.color = "red";
		document.getElementById("shipping_method").focus();
		return false;
	} else {
		document.getElementById("shipping_method_label").style.color = "black";
	}
	
	// payment_method
	if (document.getElementById("payment_method").value == 'select') {
		alert("Please select a payment method.");
		document.getElementById("payment_method_label").style.color = "red";
		document.getElementById("payment_method").focus();
		return false;
	} else {
		document.getElementById("payment_method_label").style.color = "black";
	}*/
	
	/*if (!document.getElementById("agree").checked) {
		alert("Please read our terms and conditions and tick the checkbox if you agree with them.");
		return false;
	}*/
			
	if (document.getElementById("txtCaptcha").value.length == 5) {
		
		$.ajax({
			type	: "POST",
			url		: "captcha.php",
			data	: "txtCaptcha=" + document.getElementById("txtCaptcha").value + "&key=" + key(10000),
			success	: function(html){
				$("#result").empty();
				$("#result").append(html);
				
				if (html == "FAIL") {
					alert("The code you entered was incorrect. Please try again.");
					$("#imgCaptcha").attr("src", "create_image.php?key=" + key(10000));
				} else {
					document.checkout.submit();
				}
			}
		});
		return false;
		
	} else {
		alert("Please enter the exact code on the image into the text box and try again.");
		document.getElementById("txtCaptcha").focus();
		return false;
	}
	
}

function validate_register() {
	
	// first_name
	if (document.getElementById("first_name").value.length < 1) {
		alert("Please enter a valid first name.");
		document.getElementById("first_name_label").style.color = "red";
		document.getElementById("first_name").focus();
		return false;
	} else {
		document.getElementById("first_name_label").style.color = "black";
	}
	
	// last_name
	if (document.getElementById("last_name").value.length < 1) {
		alert("Please enter a valid last name.");
		document.getElementById("last_name_label").style.color = "red";
		document.getElementById("last_name").focus();
		return false;
	} else {
		document.getElementById("last_name_label").style.color = "black";
	}
	
	// email_1 (validate)
	if (echeck(document.getElementById("email_1").value) == false) {
		alert("Please enter a valid email address.");
		document.getElementById("email_1_label").style.color = "red";
		document.getElementById("email_1").focus();
		return false;
	} else {
		document.getElementById("email_1_label").style.color = "black";
	}
	
	// email_2
	if (document.getElementById("email_2").value != document.getElementById("email_1").value) {
		alert("Please make sure the email addresses are the same.");
		document.getElementById("email_2_label").style.color = "red";
		document.getElementById("email_2").focus();
		return false;
	} else {
		document.getElementById("email_2_label").style.color = "black";
	}
	
	/*if (!document.getElementById("agree").checked) {
		alert("Please read our terms and conditions and tick the checkbox if you agree with them.");
		return false;
	}*/
			
	if (document.getElementById('result').innerHTML != 'PASS') {
		//getParam(document.getElementById('request'));
		alert("Please enter the exact code on the image into the text box and click the SECURITY CHECK link.");
		document.getElementById("txtCaptcha").focus();
		return false;
	}
	
}

function validate_enquire() {
	
	// title
	if (document.getElementById("title").value == 'select') {
		alert("Please select a title.");
		document.getElementById("title_label").style.color = "red";
		document.getElementById("title").focus();
		return false;
	} else {
		document.getElementById("title_label").style.color = "black";
	}
	
	// first_name
	if (document.getElementById("first_name").value.length < 1) {
		alert("Please enter a valid first name.");
		document.getElementById("first_name_label").style.color = "red";
		document.getElementById("first_name").focus();
		return false;
	} else {
		document.getElementById("first_name_label").style.color = "black";
	}
	
	// last_name
	if (document.getElementById("last_name").value.length < 1) {
		alert("Please enter a valid last name.");
		document.getElementById("last_name_label").style.color = "red";
		document.getElementById("last_name").focus();
		return false;
	} else {
		document.getElementById("last_name_label").style.color = "black";
	}
	
	// email_1 (validate)
	if (echeck(document.getElementById("email_1").value) == false) {
		alert("Please enter a valid email address.");
		document.getElementById("email_1_label").style.color = "red";
		document.getElementById("email_1").focus();
		return false;
	} else {
		document.getElementById("email_1_label").style.color = "black";
	}
	
	// email_2
	if (document.getElementById("email_2").value != document.getElementById("email_1").value) {
		alert("Please make sure the email addresses are the same.");
		document.getElementById("email_2_label").style.color = "red";
		document.getElementById("email_2").focus();
		return false;
	} else {
		document.getElementById("email_2_label").style.color = "black";
	}

	// message
	if (document.getElementById("message").value == '') {
		alert("Please enter a valid message.");
		document.getElementById("message_label").style.color = "red";
		document.getElementById("message").focus();
		return false;
	} else {
		document.getElementById("message_label").style.color = "black";
	}
	
	/*if (!document.getElementById("agree").checked) {
		alert("Please read our terms and conditions and tick the checkbox if you agree with them.");
		return false;
	}*/
	
	if (document.getElementById('result').innerHTML != 'PASS') {
		//getParam(document.getElementById('request'));
		alert("Please enter the exact code on the image into the text box and click the SECURITY CHECK link.");
		document.getElementById("txtCaptcha").focus();
		return false;
	}
	
}

function changeImage(img_src) {
	//document.write(img_src);
	document['main_image'].src = img_src;
}