How to validate two dates difference in JavaScript

In this article I will explain how to validate two dates difference in JavaScript.

function CompareDateTest(txtfrom, txtto) {

        var From = document.getElementById(txtfrom).value;

        var To = document.getElementById(txtto).value;

      

        var POdmy = From.split("/");

        var IVdmy = To.split("/");

        if (parseInt(POdmy[2], 10) > parseInt(IVdmy[2], 10)) {

            alert("Expiration Date must be greater than Effective Date .");

            return false;

        }

        else if (parseInt(POdmy[0], 10) > parseInt(IVdmy[0], 10) && (parseInt(POdmy[2], 10) == parseInt(IVdmy[2], 10))) {

            alert("Expiration Date must be greater than Effective Date .");

            return false;

        }

        else if (parseInt(POdmy[1], 10) > parseInt(IVdmy[1], 10) && parseInt(POdmy[0], 10) == parseInt(IVdmy[0], 10) && parseInt(POdmy[2], 10) == parseInt(IVdmy[2], 10)) {

            alert("Expiration Date must be greater than Effective Date .");

            return false;

        }     

    

        else if (From == "") {

            alert("Effective Date is mandatory .");

            return false;

        }

        return true;

    }