if(navigator.userAgent.match(/Trident\/7\./)) {
$('body').on("mousewheel", function () {
event.preventDefault();

var wheelDelta = event.wheelDelta;

var currentScrollPosition = window.pageYOffset;
window.scrollTo(0, currentScrollPosition - wheelDelta);
});

$('body').keydown(function (e) {

var currentScrollPosition = window.pageYOffset;

switch (e.which) {

case 38: // up
e.preventDefault(); // prevent the default action (scroll / move caret)
window.scrollTo(0, currentScrollPosition - 120);
break;

case 40: // down
e.preventDefault(); // prevent the default action (scroll / move caret)
window.scrollTo(0, currentScrollPosition + 120);
break;

default: return; // exit this handler for other keys
}
});
}