get sum of td 1 and td 2 and store in td 3 for selected row
<head id="Head1" runat="server">
<title></title>
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.2/jquery-ui.js"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
<table class="table1">
<thead>
<input id="b1" class="sum" type="Button" value="ClickMe" />
</thead>
<tr>
<td class="value2">29</td>
<td>
<input id="v1" class="value1" type="text" />
</td>
<td class="result"></td>
</tr>
<tr>
<td class="value2">23</td>
<td>
<input id="Text1" class="value1" type="text" />
</td>
<td class="result"></td>
</tr>
<tr>
<td class="value2">12</td>
<td>
<input id="Text2" class="value1" type="text" />
</td>
<td class="result"></td>
</tr>
</table>
</div>
</form>