<form id="someForm" method="get" action="">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
     <td><input name="radiobutton" type="radio" id ="radio1" onClick="submitForm('someForm');" value="value1" /></td>
     <td class="${pageContext.request.contextPath}/images/style2"><s:text name="ttsystem.ticket.type.dataTransmission" /></td>
     <td><img src="${pageContext.request.contextPath}/images/spacer.gif" width="35" height="1" /></td>
     <td><input name="radiobutton" type="radio" id="radio2" onClick="submitForm('someForm');" value="value2" /></td>
     <td><s:text name="ttsystem.ticket.type.noSignal" /></td>
     <td><img src="${pageContext.request.contextPath}/images/spacer.gif" width="35" height="1" /></td>
     <td><input name="radiobutton" type="radio" id="radio3" onClick="submitForm('someForm');" value="value3" /></td>
     <td><s:text name="ttsystem.ticket.type.voiceCalls" /></td>
     <td><img src="${pageContext.request.contextPath}/images/spacer.gif" width="35" height="1" /></td>
     <td><input name="radiobutton" type="radio" id="radio4" onClick="submitForm('someForm');" value="value4" /></td>
     <td><s:text name="ttsystem.ticket.type.services" /></td>
</tr>
</table>
</form>
<%=request.getParameter("radiobutton")%>

script language="javascript" type="text/javascript">  
function submitForm(FormId) {
     if (document.getElementById('someForm') != null) {
          document.getElementById('someForm').submit();
     }
}

</script>