javascript - How to find out what character key is pressed?

Question

I would like to find out what character key is pressed in a cross-browser compatible way in pure Javascript.

Answer 1

"Clear" JavaScript:

function myKeyPress(e){
  var keynum;

  if(window.event) { // IE                  
    keynum = e.keyCode;
  } else if(e.which){ // Netscape/Firefox/Opera                 
    keynum = e.which;
  }

  alert(String.fromCharCode(keynum));
}

<input type="text" onkeypress="return myKeyPress(event)" />