/*
	Takes a string value and returns false if any
	character is not a letter, number or space.
	Also allows single apostrophe for names with
	that character, such as "O'Connor"
*/
function isAlphaNumeric( str, allowBlank ) {
	if ( (str.length < 1) && (allowBlank == true) ) return true;
	if ( (str.length < 1) && (allowBlank == false) ) return false;
	re = /[^0-9A-Za-z\-\ ]/g;
	return !re.test( str );
}