Knockout ie enter key fix

HTML

<input data-bind='value: ImageName' onkeydown='return pfHandleEnter(this, event);' />
<br />
<img style="min-height:200px;min-width:200px" data-bind='src: Url' />
<span data-bind='text: Url'>

JavaScript

// Here's my data model
        var ViewModel = function (lsImageName) {
            this.ImageName = ko.observable(lsImageName);

            this.Url = ko.computed(function () {
                return "/images/" + this.ImageName() + ".jpg";
            }, this);

        };

        ko.applyBindings(new ViewModel("")); // This makes Knockout get to work
        
        function pfHandleEnter(loObject, loEvent) {
            if (loEvent.keyCode === 13) {
                loObject.blur();
                return false;
            }
            return true;
        }