select option 3 level html : Can you help me! This code, select option 1 show apple, next select apple show iphone, all select other show input other. thanks you so much!
    
    <select name="1">
                <option value="Apple">Apple</option>
                <option value="Samsung">Samsung</option>
                <option value="other">Other</option>
        </select>
        
        <select name="Apple">
                <option value="iphone">iPhone 7</option>
                <option value="ipad">iPad Super Pro</option>
                <option value="other">Other</option>
        </select>
        
        <select name="Samsung">
                <option value="note">Note 6</option>
                <option value="galaxy">Galaxy S8</option>
                <option value="other">Other</option>
        </select>
        
        <input type="text" name="other"/>