View Full Version : Disable browser F1 and replace with own content

08-27-2009, 12:10 PM
1) CODE TITLE: Disable browser F1 and replace with own content (cross browser compatible)

2) AUTHOR NAME/NOTES: Phill Moore, Regent Internet (www.regentinternet.co.uk)

3) DESCRIPTION: For site specific help, particularly browser based applications - this script disables the standard browser help and allows you to do your own thing. Tested and works in FF 3.0.13, IE 7, Opera 9.63, Safari 3.2.2, Google Chrome 2. I use with DHTML Window Widget v1.1 from Dynamic Drive to bring up my own help box.

URL to live example: http://www.regentinternet.co.uk/f1test/f1test.html

or, ATTACHED BELOW (see #3 in guidelines below):

// disable MSIE standard help function
document.onhelp = new Function("return false;");
window.onhelp = new Function("return false;");


// get key stroke for Firefox, Opera, Google Chrome
document.onkeypress = keyHit;

// get key stroke for MSIE, Safari
var browser=navigator.userAgent;
if (browser.search(/msie|safari/i) != -1) document.onkeydown = keyHit;

// keystroke handling
function keyHit(event) {

// get correct keycode depending on browser
var keyStruck;
if (browser.search(/msie|safari/i) != -1) keyStruck = window.event.keyCode; else keyStruck = event.keyCode;

if (keyStruck == 112) {
if (browser.search(/msie/i) == -1) { // disable browser standard help function for all but MSIE (see above for MSIE)
keyAction('help'); // call routine to replace standard help function

// You can add the capture of other keystrokes here


// replacement help function
function keyAction(action) {

if (action == 'help') {
// Your new help function goes here
// I have used in conjunction with DHTML Window widget (v1.1) from Dynamic Drive to deliver a new help file

// You can add the actions for other keystrokes here