private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (modifiedDocument)
            {
                DialogResult saveDocumentMsgBox = ShowSaveDocumentPrompt();
                switch (saveDocumentMsgBox)
                {
                case DialogResult.Yes:
                    if (newFile)
                    {
                        saveToolStripMenuItem_Click(sender, e);
                    }
                    else
                    {
                        builder.SaveHtmlFile(filePath);
                    }
                    break;

                case DialogResult.No:
                case DialogResult.Cancel:
                    break;
                }
            }

            OpenFileDialog dlgOpenFile = new OpenFileDialog();

            dlgOpenFile.Filter      = "HTML Files (*.html, *.htm)|*.html;*.htm";
            dlgOpenFile.Multiselect = false;
            dlgOpenFile.Title       = "Open HTML File";
            dlgOpenFile.ShowDialog();

            try
            {
                if (File.Exists(dlgOpenFile.FileName))
                {
                    builder.LoadHtmlFile(dlgOpenFile.FileName);
                    modeTabs.Visible = true;

                    filePath = dlgOpenFile.FileName;
                    string fileName = filePath.Split('\\').Last();
                    this.Text        = fileName + " - Easy Web Page Builder";
                    newFile          = false;
                    modifiedDocument = false;
                    openedDocument   = true;
                    EnableMenuItems();
                    browserDesign.Focus();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }