function validEmail(email) {
	invalidChars = " /:,;"
	
	if (email == "") {
		return false
	}
	for (i=0; i<invalidChars.length; i++) {
		badChar = invalidChars.charAt(i)
		if (email.indexOf(badChar,0) > -1) {
			return false
		}
	}
	atPos = email.indexOf("@",1)
	if (atPos == -1) {
		return false
	}
	if (email.indexOf("@",atPos+1) != -1) {
		return false
	}
	periodPos = email.indexOf(".",atPos)
	if (periodPos == -1) {
		return false
	}	
	if (periodPos+3 > email.length) {
		return false
	}
	return true
}

function submitSachet(userform) {
	if (userform.firstname.value == "") {
		alert ("Please enter your first name.")
		userform.firstname.focus()
		userform.firstname.select()
		return false
	}
	if (userform.lastname.value == "") {
		alert ("Please enter your last name.")
		userform.lastname.focus()
		userform.lastname.select()
		return false
	}
	if (userform.address.value == "") {
		alert ("Please enter your street address.")
		userform.address.focus()
		userform.address.select()
		return false
	}
	if (userform.suburb.value == "") {
		alert ("Please enter your suburb.")
		userform.suburb.focus()
		userform.suburb.select()
		return false
	}
	if (userform.state.value == "") {
		alert ("Please enter your state.")
		userform.state.focus()
		userform.state.select()
		return false
	}
	if (userform.pcode.value == "") {
		alert ("Please enter your post code.")
		userform.pcode.focus()
		userform.pcode.select()
		return false
	}
	if (!validEmail(userform.email.value)) {
		alert("Please enter a valid email address.")
		userform.email.focus()
		userform.email.select()
		return false
	}
	stateOption = -1
	for (i=0; i<userform.state.length; i++) {
		if (userform.state[i].checked) {
			stateOption = i
		}
	}
	return true
}