javascript key storke source

http://www.davidpirek.com/blog/javascript-keystroke-listener

//keystroke listener
var keyStroker = function(f, k, e){

     document[e] = function(event){
        
        var keycode;
        
        //IE hack
        if ( typeof event == "undefined" ) {
            event = window.event;
        }
        
        //IE different event object
        if ( typeof event.which == "undefined" ) {
            keycode = event.keyCode;
        }
        else{
            keycode = event.which;
        }
        
        //run callback if particular key was clicked
        if(keycode==k){
            f();
        }
    };
};

keyStroker(function(){
    //write code here
}, 192, "onkeyup");