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 submitCon(userform) {
	if (userform.name.value == "") {
		alert ("Please enter your name.")
		userform.name.focus()
		userform.name.select()
		return false
	}
	if (!validEmail(userform.email.value)) {
		alert("Please enter a valid email address.")
		userform.email.focus()
		userform.email.select()
		return false
	}
	if (userform.comments.value == "") {
		alert ("Please enter your comments or query.")
		userform.comments.focus()
		userform.comments.select()
		return false
	}
	return true
}