Disable browser F1 and replace with own content

[redphill]

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.

4) URL TO CODE:
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;");

document.focus;

// 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)
        event.stopPropagation();
        event.preventDefault();    
      }
      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

}