JSP JSTL <a href call Onclick Javascript function -

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i have following code in jsp

       <a href="<c:url value="mycontroller">                                    <c:param name="prod" value="${product.productno}"/>                                    </c:url>">edit</a>

how can call javascript onclick function open popup window , pass parameters?

<script type="text/javascript">     function openpopup() {         window.open('mycontroller','width=650, height=450');     }     </script>

try this

<a href="javascript:{openpopup(\'parameter1\',\'parameter2\')}"></a>

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