function _isInteger(val) {
    var digits='1234567890';
    for (var i=0; i < val.length; i++) {
        if (digits.indexOf(val.charAt(i))===-1) { return false; }
    }
    return true;
}
function _isInteger(val) {
    var digits='1234567890';
    for (var i=0; i < val.length; i++) {
        if (digits.indexOf(val.charAt(i))===-1) { return false; }
    }
    return true;
}
function _isInteger ( val ) { var digits = '1234567890' ; for ( var i = 0 ; i < val . length ; i ++ ) { if ( digits . indexOf ( val . charAt ( i ) ) === - 1 ) { return false ; } } return true ; }
------------------------------------------------------------------ Utility functions for parsing in getDateFromFormat() ------------------------------------------------------------------
------------------------------------------------------------------ Utility functions for parsing in getDateFromFormat () ------------------------------------------------------------------