How to use Liferay portlet namespace inside script tag

There are two ways available to use <portlet:namespace/> inside script tag / js file

1) Take hidden variable inside JSP and store value of portlet name space in it
2) Use script tag inside your JSP file and directly use <portlet:namespace/>

1) Take hidden variable inside JSP and store value of portlet name space in it

    <input type="hidden" name="nameSpaceValue" id="nameSpaceValue" value='<portlet:namespace/>' />

    Once it is declared like this inside .js file we can use portlet name space like this,
   
    var nameSpaceVal = document.getElementById('nameSpaceValue').value;
   
    document. + nameSpaceVal + fm.action = {some action}
   
2) Use script tag inside your JSP file and directly use <portlet:namespace/>

    function getStudentDetail() {
    document.<portlet:namespace/>fm.action='<%=getStudentDetails%>';
    document.<portlet:namespace/>fm.submit();
    }  


For debugging purpose, you can check the value of the function(getStudentDetail()) and how the values are getting formed for the lines

document.<portlet:namespace/>fm.action='<%=getStudentDetails%>';
document.<portlet:namespace/>fm.submit();

Cheers!
Henal Saraiya
(Senior Consultant)
CIGNEX Datamatics