How to send a key to an input text field using Javascript?

Question

How I can send a combination of keys (like Ctrl+C or Alt+Shift) when cursor goes in a input text field using Javascript?

I'm not using jQuery but am using MS-Ajax. Is it possible using MS-Ajax DOM?

EDIT 1)

According to @Ghostoy help,I wrote this code:

function simulateKeyPress() {
            var evt = document.createEvent("KeyboardEvent");
            evt.initKeyEvent("keypress", true, true, window,
       0, 0, 0, 0,
       0, "e".charCodeAt(0))
            var canceled = !body.dispatchEvent(evt);
            if (canceled) {
                alert("canceled");
            } else {
                alert("not canceled");
            }
        }

but when called it I got an error:

Error: Object doesn't support property or method 'initKeyEvent'

and then I changed the KeyboardEvent to KeyEvents I got this error:

Error: DOM Exception: NOT_SUPPORTED_ERR (9)

where is my fault?

Answer 1

Simulate key events is not easy. See this question: Simulating user input for TDD JavaScript. You'd better try other workarounds.

Answer 2

Change evt.initKeyEvent(...) to evt.initKeyboardEvent(...)

or change to jQuery :)