Wael Refaat's Blog

This is a simple way to disable the default help in browser if you want to create your own help :)
Most of the code I "borrowed" from Dan Bartels' Blog and just make couple of modifications on it.

enjoy it

document.onhelp = new Function("return false;");
window.onhelp = new Function("return false;");
document.onkeydown = function (evt) {
    if (evt == null) evt = event; if (testKeyCode(evt, 112)) //F1     
    {
        cancelKeyEvent(evt); //don't allow default help popup by F1
        alert(navigator.appName); alert("This is the new help");
        return false;
    }
}

function cancelKeyEvent(evt) {
    if (window.createPopup) evt.keyCode = 0;
    else evt.preventDefault();
}
function testKeyCode(evt, intKeyCode) {
    if (window.createPopup) return evt.keyCode == intKeyCode;
    else return evt.which == intKeyCode;
}