--html--

<button id="myButtonControlID">Export Table data into Excel</button>

<div id="divTableDataHolder"> <table>     <tr><th>ColumnOne </th><th>ColumnTwo</th></tr> <tr> <td>row1ColValue1</td><td>row1ColValue2</td> </tr> <tr> <td>row2ColValue1</td><td>row2ColValue2</td> </tr> </table> </div>

------js---

$("[id$=myButtonControlID]").click(function(e) {

    window.open('data:application/vnd.ms-excel,' + encodeURIComponent( $('div[id$=divTableDataHolder]').html()));     e.preventDefault(); });