when copy html form with checkbox the checked not copied

I check the checkboxes and copied the the form to clipboard, then paste to excel, the checkboxes are unchecked! how can I copy the value as it is at the form? Thanks in advance!

<form>
    <div id="container">
       <input type="checkbox" name="chk"  />Checkbox1<br />
       <input type="checkbox" name="chk" /> Checkbox2 <br />
    </div>  
</form>