Preventing the loss of keystrokes between pages in a web application

<html><head>
<script language=javascript>
IE=document.all;
NN=document.layers;
kys="";
if (NN){document.captureEvents(Event.KEYPRESS)}
document.onkeypress=katch
function katch(e){
if (NN){kys+=e.which}
if (IE){kys+=event.keyCode}
document.forms[0].elements[0].value=kys
}
</script>
</head>
<body>
<form><input></form>
</body>
</html>