How to compare two Date attributes in a script-based validator?

Hi Ralph,

I need to write a dojo script where I can compare 2 dates, one is IBM out of the box field due date and other is system current date. I am writing a validator script where users will not be allowed to enter the Due date < Current Date. Due Date can be equal to or greater than current date. Below is the dojo script for the same.

dojo.provide("DueDateValidation");

 dojo.require("com.ibm.team.workitem.api.common.WorkItemAttributes"); // To access the work item attributes
 dojo.require("com.ibm.team.workitem.api.common.Status"); // To create a status object to return
 dojo.require("com.ibm.team.workitem.api.common.Severity"); // To create a severity for the status
 dojo.require("dojo.date"); // We need the date class from Dojo to compare two dates
 dojo.require("dojo.date.stamp"); // We need the stamp class to work with ISO date strings

 (function() {
 
 var Status = com.ibm.team.workitem.api.common.Status;
 var WorkItemAttributes = com.ibm.team.workitem.api.common.WorkItemAttributes;

 var DateValidator = dojo.declare("DueDateValidation", null, {

     validate: function(attributeId, workItem, configuration) {
         var severity = "ERROR";
         var message = "Due Date cannot be less then Current Date";
     var GetCurrentDate = new Date();
         var CurrentDate = GetCurrentDate.getTime().toString();
     var GetDueDate = dojo.date.stamp.fromISOString(workItem.getValue(com.ibm.team.workitem.api.common.WorkItemAttributes.DUE_DATE));
     var duedate = GetDueDate.getTime().toString();
     var PHED = dojo.date.stamp.fromISOString(workItem.getValue("HandoverPlannedEndDate"));
     var StringPHED = PHED.getTime().toString();

             
         // Compare the two dates and make sure DueDate is not earlier than CurrentDate
         if ((workItem.getValue(WorkItemAttributes.TYPE)=="change_request") && (duedate >= CurrentDate)) {
             return Status.OK_STATUS;
         }else {
             return new Status(Severity[severity], message);
         }
     }
 });
 })();

I am using formal process management template and the CLM version is 6.0. Please let me know your thoughts on this. Any help is appreciated. Thanks.