prevent [removed] being overridden javascript

Question

How to overcome event handlers being overridden? I have a script say a.js

window.onload = function () {
   //Handler in a.js
}

Another scri

Answer 1

Use element.addEventListener or window.attachEvent in down-level IE versions.

Sample addEvent method:

function addEvent(node, type, listener) {
    if (node.addEventListener) {
        node.addEventListener(type, listener, false);
        return true;
    } else if (node.attachEvent) {
        node['e' + type + listener] = listener;
        node[type + listener] = function() {
            node['e' + type + listener](window.event);
        }
        node.attachEvent('on' + type, node[type + listener]);
        return true;
    }
    return false;
};

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Note - Most, if not all, modern JavaScript libraries like jQuery and MooTools have their own implementations. I recommend leveraging their API's - as they abstract out different browser implementations and have been thoroughly tested.