Detect et keyboard tryk

The following script allows your visitors to reload your page simply by pressing \"r\":

<script language=\"JavaScript1.2\">

///if the user is using NS 4+
if (document.layers)
document.captureEvents(Event.KEYPRESS)
function reload_window(e){
if(String.fromCharCode(e.which)==\"r\")
window.location.reload()
}

///if the user is using NS 4+
if (document.layers)
document.onkeypress=reload_window

</script>

Nothing too out of the ordinary here- we use e.which in combination with String.fromCharCode() to detect when \"r\" is pressed, and reload the window when that happens. Notice the object detection code document.layers, which is present to screen out NS 4+ browsers.

-Launch navbar example

As an even more practical example of the keyboard interacting with JavaScript, the following launches a navigational window (aka: remote) when the user presses \"a\" or \"A\":

<script language=\"JavaScript1.2\">

if (document.layers)
document.captureEvents(Event.KEYPRESS)
function reload_window(e){
if(String.fromCharCode(e.which)==\"a\"||
String.fromCharCode(e.which)==\"A\")
navwin=window.open(\'nav.htm\',\'\',\'width=190,height=390\')
}

if (document.layers)
document.onkeypress=reload_window

</script>

Try pressing \"a\" now to see the script in action.

All of the above examples are intentionally made simplistic to allow you to focus on the fundamental technique to detecting and reacting to a key press. Having understood that, you can then go on to creating more complex key scripts, such as ones that detect when a certain word has been typed, advanced form validation scripts, and so on. But wait, we\'re not quite through with this subject matter just yet. In Part 2 of \"JavaScript and your keyboard\", we\'ll see how to detect and handle key presses in IE 4+. Stay tuned!

Fundet på http://wsabstract.com/javatutors/javascriptkey5.shtml

Det jeg ville detecte var faktisk et \"CTRL + F4\" tryk .... er det muligt ?

Jeg tror at hvis du finder charkoderne for Ctrl + F4 og bytter ovenstående ud med dem...Men er ikke nogen haj til JavaScript...

Se på http://www.eksperten.dk/spm/70973