Java script Boolean value error : In my below java script i get a error in the if condition called 

    Reference Error{value is not defined}

I don't understand why its not defined as you can see it already defined as false.

Any idea ? 

    $("input:radio[name=aboriginal]").click(function() {
               var DifferentOccasionP = false;
                DifferentOccasionP = false;
                 alert(DifferentOccasionP);   // false 
                 console.log(DifferentOccasionP);//false
                  console.log(!!DifferentOccasionP);        // false
                  console.log(typeof DifferentOccasionP);    // boolean
            if (DifferentOccasionP === false){
              alert("ab" + value);
            }else{
                alert("ddddd");
            }
    });