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 validLogin(login) {
	 if (!validEmail(login.emailAdr.value)) {
		alert("You have entered an invalid E-mail address")
		login.emailAdr.focus()	
		return false	
		}
 
 	if (login.password.value == "") {
		alert("You must enter your password")
		login.password.focus()
		return false
		}
		
	return true	
}