function checkEmail(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
	}
	if ("." == email.charAt(email.length-1)) {
		return false;
	}
	
	return true;
}

function checkNumeric(sCheckStr){
	sValidChars = "1234567890 ";
	for (i=0; i<sCheckStr.length; i++){
		tempChr = sCheckStr.substr(i, 1);
		tempChr = tempChr.toLowerCase();
		if (sValidChars.indexOf(tempChr) < 0) {
			return false;
		}
	}
	return true;
}