var Kb_keys=new Array(),
Kb_lastkey=-1,
Kb_keystrapped=0,
Kb_lastcode=-1;

function Kb_trapkey(akey){
return (new Kb_keytrap(akey.toUpperCase()));
}
function Kb_keytrap(newkey){
if(Kb_keystrapped==0){
if(Gl_browser.ns4){
document.captureEvents(Event.KEYDOWN);
document.onkeydown=kd2;
document.captureEvents(Event.KEYUP);
document.onkeyup=ku2;
if(Gl_browser.unix){
Gl_formFrameX11=new Gl_layer(0,0,200,'<form name="keytrapperform"><input type=text size=1 onblur="setTimeout(\'this.focus()\',50)" name="keyTrapper" onKeyDown="kd2(event)" onKeyUp="ku2(event)"></form>');
Gl_formFrameX11.setXlimits(-1000,1000);
Gl_formFrameX11.setYlimits(-1000,1000);
Gl_formFrameX11.moveTo(-15,-20);
Gl_formFrameX11.raw.document.forms[0].elements[0].blur();
setTimeout("Gl_formFrameX11.raw.document.forms[0].elements[0].focus()",50)
}
}else if(Gl_browser.ie){
document.body.onkeydown=kd;
document.body.onkeyup=ku
}else if(Gl_browser.dom2){
document.onkeydown=kd2;
document.onkeyup=ku2
}
if(!(Gl_browser.ns4&&navigator.userAgent.indexOf('X11')!=-1))
var waster=new Gl_layer(0,0,200,'')
}
if(document.layers&&newkey.length>1){
var trans=new Array("SHIFT","A","CTRL","Z","UP","I","DOWN","K","LEFT","J","RIGHT","L");
for(var n=0;n<trans.length;n+=2)
if(newkey==trans[n]){
newkey=trans[n+1];
break
}
}
if(newkey.length>1){
var c=0;
switch(newkey){
case 'SHIFT':
c=16;break;
case 'CTRL':
c=17;break;
case 'UP':
c=38;break;
case 'DOWN':
c=40;break;
case 'LEFT':
c=37;break;
case 'RIGHT':
c=39;break;
case 'ESC':
c=27;break;
default:
c=0
}
this.code=c;
}else
this.code=newkey.charCodeAt(0);

this.pressed=false;
this.event=null;
this.setEvent=Kb_setEvent;
this.clearEvent=Kb_clearEvent
Kb_keys[this.code]=this;
if(newkey.length==1&&newkey.toUpperCase()!=newkey.toLowerCase()){
this.code=newkey.toLowerCase().charCodeAt(0);
Kb_keys[this.code]=this;
}
Kb_keystrapped++;
return this;
}
function kd(){Kb_lastcode=window.event.keyCode;kp(window.event.keyCode,true)}
function kd2(evt){Kb_lastcode=evt.which;kp(evt.which,true)}
function ku(){kp(window.event.keyCode,false)}
function ku2(evt){kp(evt.which,false)}
function kp(wch,state){
if(Kb_keys[wch]){
Kb_keys[wch].pressed=state;
Kb_lastkey=Kb_keys[wch];
if(state&&this.event)
eval(Kb_keys[wch].event)
return false;
}
}
function Kb_setEvent(x){this.event=x}
function Kb_clearEvent(x){this.event=null}
function Kb_clearTrappedKeys(){var n;for(n in Kb_keys)Kb_keys[n]=null}