function validateForm(theForm)
{
	if (theForm.surname.value.length == 0)
	{
		alert("Please enter your surname!");
		theForm.surname.focus();
		return false;
	}

	else if (theForm.firstname.value.length == 0)
	{
		alert("Please enter your first name!");
		theForm.firstname.focus();
		return false;
	}

	else if (theForm.address.value.length == 0)
	{
		alert("Please enter your address!");
		theForm.address.focus();
		return false;
	}

	else if (theForm.city.value.length == 0)
	{
		alert("Please enter your city!");
		theForm.city.focus();
		return false;
	}

    else if (theForm.province.selectedIndex == 0)
	{
		alert ("Please select your province!");
		theForm.province.focus();
		return false;
	}

	else if (theForm.postalcode.value.length == 0)
	{
		alert("Please enter your postal code!");
		theForm.postalcode.focus();
		return false;
	}

	else if (ValidatePostalCode(theForm.postalcode.value) == false)
	{
		alert("Invalid postal code!");
		theForm.postalcode.focus();
		theForm.postalcode.select();
		return false;
	}

	else if (theForm.areacode.value.length == 0)
	{
		alert("Please enter your area code!");
		theForm.areacode.focus();
		return false;
	}

	else if (isNaN(theForm.areacode.value))
	{
		alert("Area code must contain numbers only!");
		theForm.areacode.focus();
		theForm.areacode.select();
		return false;
	}

	else if (theForm.areacode.value.length != 3)
	{
		alert("Invalid area code!");
		theForm.areacode.focus();
		theForm.areacode.select();
		return false;
	}

	else if (theForm.workphone.value.length == 0)
	{
		alert("Please enter your work phone number!");
		theForm.workphone.focus();
		return false;
	}

	else if (isNaN(theForm.workphone.value))
	{
		alert("Phone number must contain numbers only!");
		theForm.workphone.focus();
		theForm.workphone.select();
		return false;
	}

	else if (theForm.workphone.value.length != 7)
	{
		alert("Invalid phone number!");
		theForm.workphone.focus();
		theForm.workphone.select();
		return false;
	}

	else if (theForm.homephone.value.length == 0)
	{
		alert("Please enter your home phone number!");
		theForm.homephone.focus();
		return false;
	}

	else if (isNaN(theForm.homephone.value))
	{
		alert("Phone number must contain numbers only!");
		theForm.homephone.focus();
		theForm.homephone.select();
		return false;
	}

	else if (theForm.homephone.value.length != 7)
	{
		alert("Invalid phone number!");
		theForm.homephone.focus();
		theForm.homephone.select();
		return false;
	}

	else if (theForm.email.value.length == 0)
	{
		alert("Please enter your e-mail address!");
		theForm.email.focus();
		return false;
	}

	else if (ValidateEmail(theForm.email.value) == false)
	{
		alert("Invalid e-mail address!");
		theForm.email.focus();
		theForm.email.select();
		return false;
	}

    else if (theForm.Choice_1A.selectedIndex == 0)
	{
		alert ("Please select your 1st choice for the concurrent A session!");
		theForm.Choice_1A.focus();
		return false;
	}

    else if (theForm.Choice_2A.selectedIndex == 0)
	{
		alert ("Please select your 2nd choice for the concurrent A session!");
		theForm.Choice_2A.focus();
		return false;
	}

    else if (theForm.Choice_3A.selectedIndex == 0)
	{
		alert ("Please select your 3rd choice for the concurrent A session!");
		theForm.Choice_3A.focus();
		return false;
	}

    else if (theForm.Choice_1A.selectedIndex == theForm.Choice_2A.selectedIndex ||
		 theForm.Choice_1A.selectedIndex == theForm.Choice_3A.selectedIndex ||
		 theForm.Choice_2A.selectedIndex == theForm.Choice_3A.selectedIndex)
	{
		alert ("You have duplicated one of your 'A' selections!");
		theForm.Choice_2A.focus();
		return false;
	}

    else if (theForm.Choice_1B.selectedIndex == 0)
	{
		alert ("Please select your 1st choice for the concurrent B session!");
		theForm.Choice_1B.focus();
		return false;
	}

    else if (theForm.Choice_2B.selectedIndex == 0)
	{
		alert ("Please select your 2nd choice for the concurrent B session!");
		theForm.Choice_2B.focus();
		return false;
	}

    else if (theForm.Choice_3B.selectedIndex == 0)
	{
		alert ("Please select your 3rd choice for the concurrent B session!");
		theForm.Choice_3B.focus();
		return false;
	}

    else if (theForm.Choice_1B.selectedIndex == theForm.Choice_2B.selectedIndex ||
		 theForm.Choice_1B.selectedIndex == theForm.Choice_3B.selectedIndex ||
		 theForm.Choice_2B.selectedIndex == theForm.Choice_3B.selectedIndex)
	{
		alert ("You have duplicated one of your 'B' selections!");
		theForm.Choice_2B.focus();
		return false;
	}

    else if (theForm.Choice_1C.selectedIndex == 0)
	{
		alert ("Please select your 1st choice for the concurrent C session!");
		theForm.Choice_1C.focus();
		return false;
	}

    else if (theForm.Choice_2C.selectedIndex == 0)
	{
		alert ("Please select your 2nd choice for the concurrent C session!");
		theForm.Choice_2C.focus();
		return false;
	}

    else if (theForm.Choice_3C.selectedIndex == 0)
	{
		alert ("Please select your 3rd choice for the concurrent C session!");
		theForm.Choice_3C.focus();
		return false;
	}

    else if (theForm.Choice_1C.selectedIndex == theForm.Choice_2C.selectedIndex ||
		 theForm.Choice_1C.selectedIndex == theForm.Choice_3C.selectedIndex ||
		 theForm.Choice_2C.selectedIndex == theForm.Choice_3C.selectedIndex)
	{
		alert ("You have duplicated one of your 'C' selections!");
		theForm.Choice_2C.focus();
		return false;
	}
	
    else if (theForm.music_ministry[0].checked == false &&
    		 theForm.music_ministry[1].checked == false)
	{
		alert ("Please specify if you can help with the music ministry!");
		return false;
	}
	
	return true;
}


function ValidateEmail(myEmail)
{
	validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;

	// search email text for regular exp matches
	if (myEmail.search(validRegExp) == -1) 
	{
		return false;
	} 
	return true; 
}


// Check that a Canadian postal code is valid
function ValidatePostalCode(myPostal)
{
	if (myPostal.search)
	{
		myPostal = removeSpaces(myPostal);
		if (myPostal.length == 6 &&
			myPostal.search(/^[a-zA-Z]\d[a-zA-Z]\d[a-zA-Z]\d$/) != -1)
		{
			return true;
		}
		else if (myPostal.length == 7 &&
				 myPostal.search(/^[a-zA-Z]\d[a-zA-Z]-\d[a-zA-Z]\d$/) != -1)
		{
			return true;
		}
		else
		{
			return false;
		}
	}
	return true;
}


// Remove all spaces from a string
function removeSpaces(string)
{
	var newString = '';
	for (var i = 0; i < string.length; i++)
	{
		if (string.charAt(i) != ' ')
		{
			newString += string.charAt(i);
		}
	}
	return newString;
}