Problem using variable in validation rules

Problem using variable in validation rules

I am a jquery newbie. I could get the validation rules working in my form. I am using a Java framework and for some reason, when it converts from .xhtml to .html, all the ui component's id/name were prefixed with the form that containing it. I would like to reuse these validation rules for two other forms but because of the prefix issue, I would need to use js variable and pass the formId to the function. For some reason, this gives me a problem:

============
NOT WORKING
============

var positionTitle = "#myForm:positionTitle";
   
$("#" + formId).validate({
     
      rules:{
            positionTitle : {required:true, maxlength:50},
                ...

========
WORKING
========

$("#" + formId).validate({
     
      rules:{
             "#myForm:positionTitle" : {required:true, maxlength:50},
                  ...