Hi @Chetan Mahajan ,

Thanks for the reply, I tried this but it is not working as expected. when i select a client callable in the script include, it is showing the following systax

var CheckEmailAndGroup = Class.create();
CheckEmailAndGroup.prototype = Object.extendsObject(AbstractAjaxProcessor, {

    type: 'CheckEmailAndGroup'
});
 
instead of this syntax 
var CheckEmailAndGroup = Class.create();

CheckEmailAndGroup.prototype = {
    initialize: function() {},