Angularjs - Split String issue

I am temporarily devoid of seeing eyes.. The code below throws up an error

Error: value.split is not a function

Is threre an angularjs way of splitting a simple string

var value = "7,9";

$scope.getTemplate = function(value){

    var values = value.split(",");

    value1 = values[0];
    value2 = values[1];

    $scope.templateid = value1;
    $scope.userid = value2;
}