Better autocompletion for hack.chat

auto-completion.js

var orig_keydown = $("#chatinput").onkeydown;
$("#chatinput").onkeydown = function(e){
  if(e.keyCode==9){
    e.preventDefault();
		var pos = e.target.selectionStart || 0;
		var text = e.target.value;
		var index = text.lastIndexOf('@', pos);
		if (index >= 0) {
			var stub = text.substring(index + 1, pos);
			// Search for nick beginning with stub
			var nicks = onlineUsers.filter(function(nick) {
				return nick.indexOf(stub) == 0;
			});
			if(nicks.length==0){
				insertAtCursor(nicks[0].substr(stub.length));
			}
				insertAtCursor(nicks[0].substr(stub.length)+" ");
		}
  }
  else{
    orig_keydown(e);
  }
}