asp.net - Calling a javascript and VB function from a submit button -


i have form when submit calls btnsendfeedback_click function first ignoring function verifyrecapcha().

how can work check both functions?

since btnsendfeedback_click sends email ignores verifyrecapcha , show panelmailsent.

<script language="vb" runat="server">     sub btnsendfeedback_click(sender object, e eventargs)         ....more code .....          'now, send message, use send method of smtpmail class         smtpmail.send(objmm)         panelsendemail.visible = false         panelmailsent.visible = true     end sub </script>  <form id="form1" name="_ctl0" runat="server">     <asp:button runat="server" id="btnsendfeedback" onclick="btnsendfeedback_click" onclientclick="verifyrecapcha()" text="send" />                                </form>   <asp:panel id="panelmailsent" runat="server" visible="false">     <div style="font-weight: bold; text-align: center;">thank you.</div> </asp:panel>  <script type="text/javascript">             function verifyrecapcha() {              //   debugger                 $('#captcha').html('');                 var v = grecaptcha.getresponse();                 if (v.length == 0) {                     $('#captcha').html("you can't leave captcha code empty");                     return false;                 }                 if (v.length != 0) {                     $('#captcha').html("captcha completed");                     return true;                 }             } </script>


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