//*****************************************************************************************************
function CheckEmail(email) {
	// returns -1 if blank email address
	// returns 0 if email is invalid
	// returns 1 if email is valid

	if (email == ''){
		return -1;
	}
	
	if ((email.indexOf("@") > 1) && (email.lastIndexOf(".") > 0)){
		// email address contains @ and .

		if (email.indexOf("@") < email.lastIndexOf(".")) {
			// email address looks like x@xx.xxx
			return 1;
		}
	}

	// otherwise, email is invalid	
	return 0;
}