Sorry, it's not a short simple script to write, but I can tell you that you needsomething like this code to find which key was pressed
Which key has been pressed?
This one is relatively easy. First get the code of the key (a = 65) from the keyCode property.
When you’ve read out the key code, send it through the method String.fromCharCode() to obtain the actual key value, if necessary.
function doSomething(e) {
var code;
if (!e) var e = window.event;
if (e.keyCode) code = e.keyCode;
else if (e.which) code = e.which;
var character = String.fromCharCode(code);
alert('Character was ' + character);
}
Which I found on http://www.quirksmode.org/js/events_properties.html
and you have to build a string into a global variable using +=. The variable must be global (declared outside of a function) because otherwise it would reset every time the function was called. Then you have to call the function onkeyup event.
As for updating the page, the function will contain a statement like:
document.getElementById('elId').innerHTML
Or you could use the DOM methods, which will achieve the same results with more code
