function pxparseFloat(x, y) {
    x = x.toString();
    var num = x;
    var data = num.split(".");
    var you = data[1].split(""); //将右边转换为数组 得到类似 [1,0,1]
    var sum = 0; //小数部分的和
    for (var i = 0; i < data[1].length; i++) {
        sum += you[i] * Math.pow(y, -1 * (i + 1))
    }
    return parseInt(data[0], y) + sum;
}

function zhengze(x) {
    var str;
    x = parseInt(x);
    if (x <= 10) {
        str = new RegExp("^[+\\-]?[0-" + (x - 1) + "]*[.]?[0-" + (x - 1) + "]*$", "gi");
    } else {
        var letter = "";
        switch (x) {
            case 11:
                letter = "a";
                break;
            case 12:
                letter = "b";
                break;
            case 13:
                letter = "c";
                break;
            case 14:
                letter = "d";
                break;
            case 15:
                letter = "e";
                break;
            case 16:
                letter = "f";
                break;
            case 17:
                letter = "g";
                break;
            case 18:
                letter = "h";
                break;
            case 19:
                letter = "i";
                break;
            case 20:
                letter = "j";
                break;
            case 21:
                letter = "k";
                break;
            case 22:
                letter = "l";
                break;
            case 23:
                letter = "m";
                break;
            case 24:
                letter = "n";
                break;
            case 25:
                letter = "o";
                break;
            case 26:
                letter = "p";
                break;
            case 27:
                letter = "q";
                break;
            case 28:
                letter = "r";
                break;
            case 29:
                letter = "s";
                break;
            case 30:
                letter = "t";
                break;
            case 31:
                letter = "u";
                break;
            case 32:
                letter = "v";
                break;
            case 33:
                letter = "w";
                break;
            case 34:
                letter = "x";
                break;
            case 35:
                letter = "y";
                break;
            case 36:
                letter = "z";
                break;
        }
        str = new RegExp("^[+\\-]?[0-9a-" + letter + "]*[.]?[0-9a-" + letter + "]*$", "gi");
    }
    return str;
}
var n = 50;
var shurukuang = "";
var flag = "";

function px(y) {
    if ($("#input_value").val() != flag || y) {
        flag = $("#input_value").val();
        if ($("#input_num").selectedIndex < n) {
            $("#input_value").val("");
            $("#output_value").val("");
        } else {
            var px00 = $("#input_value").val();
            var px0 = px00.match(zhengze($("#input_num").val()));
            if (px0) {
                if (px0[0].indexOf(".") == -1) {
                    var px1 = parseInt(px0, $('#input_num').val());
                } else {
                    var px1 = pxparseFloat(px0, $('#input_num').val());
                }
                px1 = px1.toString($('#output_num').val());
                $("#output_value").val(px1);
                shurukuang = px00;
            } else {
                $("#input_value").val(shurukuang);
            }
        }
        n = $("#input_num").selectedIndex;
    }
    if ($("#input_value").val() == "") {
        $("#output_value").val("");
    }
}