string value range slider using jquery

Question

var values = [68, 69, 70, 71, 72, 73, 74];
    $("#price_range2").slider({
        min: 68,
        max: 74,

        values:[74, 68],
        slide: function( event, ui ) {
            $('#price_show2').text(String.fromCharCode(ui.value));
            $('#hidden_minimum_price2').val(String.fromCharCode(ui.values[0]));
            //alert(String.fromCharCode(ui.values[0]));
            $('#hidden_maximum_price2').val(String.fromCharCode(ui.values[1]));
            filter_data();
        }

i created this but it only work in character.