An easy ways to do this is to call the __doPostBack() function of the javascript. An example is as follows: <input type="button" id="Button2" value="Button 2 Click" onclick="DoPostBack()" /> <script language="javascript" type="text/javascript...
// ***** First Method *****// var rdolist = document.getElementsByName("rdolist"); if (rdolist[1].checked) txtMessage.value = "First"; if (rdolist[2].checked) txtMessage.value = "Second"; if (rdolist[3].checked) txtMessage.value = "Third"; // ***** Second...