mirkoczat random group

if(window.location.pathname.slice(0,3) == "/i/"){
	var iframe = document.getElementsByTagName( 'iframe' )[1];
	var nizax_chat = iframe.contentDocument.getElementsByClassName( "chat" )[0];
} else{
	var nizax_chat = document.getElementsByClassName( "chat" )[0];
};
var nizax_input = nizax_chat.getElementsByTagName( 'input' )[0];
var nizax_messages = nizax_chat.getElementsByTagName( 'div' )[6];
var _lastdate = new Date();
var _lastmsg,_lastmsg2,_actualdate;
var nizax_trigger = true;
var _delay = false;
nizax_input.addEventListener( 'keypress', function(e){
	var key = e.which || e.keyCode;
	if(key === 13 && nizax_input.value.length > 0){
		if(nizax_trigger == true){
			_actualdate = new Date();
			if(_actualdate - _lastdate > 10000){
				setTimeout(function(){
					nizax_trigger = false;
					nizax_input.value = "/group " + Math.floor((Math.random() * 28) + 1);;
					nizax_input.dispatchEvent(e);
					_lastdate = new Date();
				}, 10);
			} else if(_delay == false) {
				_delay = true;
				setTimeout(function(){
					nizax_trigger = false;
					nizax_input.value = "/group " + Math.floor((Math.random() * 28) + 1);;
					nizax_input.dispatchEvent(e);
					_lastdate = new Date();
					_delay = false;
				}, (_actualdate - _lastdate + 10000));
			};
		};
	};
	setTimeout(function() {
		nizax_trigger = true;
		_lastmsg = nizax_messages.getElementsByClassName( 'message' )[0].innerHTML.split(/<|>/); //36 treść, 28 kto
		var _tmp = nizax_messages.getElementsByClassName( 'message' )[0];
		if(_lastmsg[28] == "SYSTEM" && _lastmsg[36].includes("Możesz zmienić kolor raz")){
			nizax_messages.removeChild( _tmp );
		};
	}, 500);
	setTimeout(function() {
		_lastmsg2 = nizax_messages.getElementsByClassName( 'message' )[1].innerHTML.split(/<|>/);
		var _tmp2 = nizax_messages.getElementsByClassName( 'message' )[1];
		if(_lastmsg2[28] == "SYSTEM" && _lastmsg2[36].includes("Możesz zmienić kolor raz")){
			nizax_messages.removeChild( _tmp2 );
		};
	}, 1000);
});