Why Isn\'t My JS `li` onclick Working in IE8?

JS li onclick Not Working on IE8

Problem:
In the provided code, the li element's click event is not triggering in Internet Explorer 8.

Solution:

IE8 does not support addEventListener. Instead, use its non-standard predecessor, attachEvent.

Code Modification:

First, create a function to handle event hookup:

var hookEvent = (function() {
    var div;
    function standardHookEvent(element, eventName, handler) {
        element.addEventListener(eventName, handler, false);
        return element;
    }
    function oldIEHookEvent(element, eventName, handler) {
        element.attachEvent("on" + eventName, function(e) {
            e = e || window.event;
            e.preventDefault = oldIEPreventDefault;
            e.stopPropagation = oldIEStopPropagation;
            handler.call(element, e);
        });
        return element;
    }
    function oldIEPreventDefault() {
        this.returnValue = false;
    }
    function oldIEStopPropagation() {
        this.cancelBubble = true;
    }
    div = document.createElement('div');
    if (div.addEventListener) {
        div = undefined;
        return standardHookEvent;
    }
    if (div.attachEvent) {
        div = undefined;
        return oldIEHookEvent;
    }
    throw "Neither modern event mechanism (addEventListener nor attachEvent) is supported by this browser.";
})();

Next, use this function to hook up the event listener:

hookEvent(document.getElementById("hd_vertical"), "click", function(e) {
    // Your event handling code here
});

Note:
IE8 also lacks support for getElementsByClassName. Instead, use querySelectorAll or querySelector:

var _url = document.querySelectorAll("." + id)[1].getAttribute('href');

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