获取JavaScript-未捕获的TypeError：

Question

我正在使用“ numscroller.js”作为计数器，但出现2个JavaScript错误-“未捕获的TypeError：无法读取HTMLHeadingElement上未定义的属性'top'。” -- 第40行。

有人可以用下面的代码帮助我吗，它显示错误在第40行中？

任何帮助将不胜感激，谢谢您。

也是有效的网址-http://bluecrystaluae.com/counter/counter.html

package bi.anpr.layouts;

import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.preference.EditTextPreference;
import android.preference.Preference;
import android.text.InputFilter;
import android.text.Spanned;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.sxx.vlctest.R;

public class LimitedEditTextPreference extends Preference implements InputFilter {

    private enum InputType {
        integerOnly, decimalOnly;
    }

    private int lastSavedIntValue = -1;
    private float min = 0, max = 100, dv = min, lastSavedDoubleValue = -1;
    private String unit = "";
    private InputType inputType = InputType.integerOnly;
    private EditText editText;
    private TextView txt_title, txt_summary, txt_unit;
    private Context context_;


    public LimitedEditTextPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        context_ = context;

        readAttributes(context, attrs, 0, 0);
    }

    public LimitedEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        context_ = context;

        readAttributes(context, attrs, defStyleAttr, defStyleRes);
    }

    public void readAttributes(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        TypedArray attr = null;

        if (defStyleAttr == -1)
            attr = context.obtainStyledAttributes(R.styleable.LimitedEditTextPreference);
        else
            attr = context.obtainStyledAttributes(attrs, R.styleable.LimitedEditTextPreference, defStyleAttr, defStyleRes);

        int type = attr.getInt(R.styleable.LimitedEditTextPreference_lep_type, 0);

        if (type == 1)
            inputType = InputType.decimalOnly;

        min = attr.getFloat(R.styleable.LimitedEditTextPreference_lep_minValue, 0);
        max = attr.getFloat(R.styleable.LimitedEditTextPreference_lep_maxValue, 100);
        unit = attr.getString(R.styleable.LimitedEditTextPreference_lep_unit);

        TypedArray defaltValAttr = context.obtainStyledAttributes(attrs, new int[]{android.R.attr.defaultValue});
        dv = defaltValAttr.getFloat(0, min);

        attr.recycle();
        defaltValAttr.recycle();
    }


    @Override
    protected synchronized View onCreateView(ViewGroup parent) {
        super.onCreateView(parent);

        SharedPreferences sharedPref = context_.getSharedPreferences(getKey(), Context.MODE_PRIVATE);

        View v = initViews(parent);

        txt_title.setText(getTitle());
        txt_unit.setText(unit);

        if (getSummary() != null && getSummary().toString().trim().length() > 1)
            txt_summary.setText(getSummary());
        else {
            txt_summary.setText("");
            txt_summary.setTextSize(0);
        }

        if (inputType == InputType.integerOnly) {
            lastSavedIntValue = sharedPref.getInt(getKey(), (int) dv);
            editText.setText(String.valueOf(lastSavedIntValue));
        } else if (inputType == InputType.decimalOnly) {
            lastSavedDoubleValue = sharedPref.getFloat(getKey(), dv);
            editText.setText(String.valueOf(lastSavedDoubleValue));
        }
        editText.setFilters(new InputFilter[]{this});
        editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                String val = editText.getText().toString();
                if (!TextUtils.isEmpty(val)) {
                    if (inputType == InputType.integerOnly) {
                        if (Integer.valueOf(val) < min) {
                            Toast.makeText(context_, getTitle() + ": Accepted input Range = [" + min + ", " + max + "]", Toast.LENGTH_SHORT).show();
                            editText.setText(String.valueOf(lastSavedIntValue));
                            editText.clearFocus();
                            return;
                        } else
                            savePref(Integer.valueOf(val));
                    } else if (inputType == InputType.decimalOnly)
                        if (Float.valueOf(val) < min) {
                            Toast.makeText(context_, getTitle() + ": Accepted input Range = [" + min + ", " + max + "]", Toast.LENGTH_SHORT).show();
                            editText.setText(String.valueOf(lastSavedDoubleValue));
                            editText.clearFocus();
                            return;
                        } else
                            savePref(Float.valueOf(val));

                }
            }
        });

        return v;
    }

    @Override
    public void notifyDependencyChange(boolean disableDependents) {
        super.notifyDependencyChange(disableDependents);
        notifyChanged();

    }

    private View initViews(ViewGroup parent) {
        LayoutInflater li = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = li.inflate(R.layout.limited_edittextpreference_view, parent, false);

        if (editText != null)
            return v;

        editText = v.findViewById(R.id.txt_lep_edit);
        txt_title = v.findViewById(R.id.txt_lep_title);
        txt_summary = v.findViewById(R.id.txt_lep_summary);
        txt_unit = v.findViewById(R.id.txt_lep_unit);

        return v;
    }


    @Override
    protected void onBindView(View view) {
        super.onBindView(view);
        view.setClickable(true);
        view.setFocusable(false);
        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                editText.requestFocus();
                InputMethodManager imm = (InputMethodManager) context_.getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
            }
        });
    }

    public void savePref(Number number) {
        SharedPreferences sharedPref = context_.getSharedPreferences(getKey(), Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPref.edit();
        if (inputType == InputType.integerOnly) {
            editor.putInt(getKey(), number.intValue());
            lastSavedIntValue = number.intValue();
        } else if (inputType == InputType.decimalOnly) {
            editor.putFloat(getKey(), number.floatValue());
            lastSavedDoubleValue = number.floatValue();
        }

        editor.commit();
    }

    @Override
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        try {
            String replacement = source.subSequence(start, end).toString();
            String newVal = dest.toString().substring(0, dstart) + replacement + dest.toString().substring(dend, dest.toString().length());

            if (newVal.equalsIgnoreCase("-")) return null;

            if (inputType == InputType.integerOnly) {
                int input = Integer.parseInt(newVal);
                if (input <= max)
                    return null;
            } else if (inputType == InputType.decimalOnly) {
                double input = Float.parseFloat(newVal);
                if (input <= max)
                    return null;
            }

        } catch (NumberFormatException nfe) {
        }

        return "";
    }

}