div loading is not proper while using ajax

I have to load a div with a list of c开发者_运维技巧heck boxes using ajax. I have writen ajax code to fetch the string containing the list of check boxes.`

        document.getElementById("roleCheckBoxes").innerHTML="";

        $('#roleCheckBoxes').append(xmlhttp.responseText.toString());

the data are fetching properly but the display alone not reflecting the string which I gave instead it displays a the list of check boxes with all checked.

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Maybe the checkboxes in the HTML you get contain checked="true"?