var cmsinprocess = "false";

function chatMessageSend(message) {

	if(cmsinprocess == "true") {
		alert('Message now sending.');
		return false;
	}
	$('throbber').style.display='block';
	cmsinprocess = "true";

	var myRequest = new Request({method: 'get', url: '/chat-mesSend'});
	
	myRequest.onSuccess = function(text, xml) {
	
		if(text == "err1") {
			alert('Подождите, пока ответят на предыдущий вопрос');
			cmsinprocess = "false";
			$('throbber').style.display='none';
			return;
		}
		$('messageSend').value="";
		
		chatUpdate();
		
		cmsinprocess = "false";
		$('throbber').style.display='none';
	}
	
	myRequest.send('message='+message);
}

function chatUpdate(what) {
	$('throbber').style.display='block';
	if(what == "last") what = "?getLast=true";
	else what = "";
	
	var myRequest = new Request({method: 'get', url: '/chat-getNew'+what});
	var oScroll = $('chatWindow');
		
	myRequest.onSuccess = function(text, xml) {
		//alert(text);
		if(text != "<table cellpadding=0 cellspacing=0 class=text></table>") {
			//$('chatWindow').innerHTML = $('chatWindow').innerHTML+text;
			var scrollDown = (oScroll.scrollHeight - oScroll.scrollTop <= oScroll.offsetHeight );
			// display the message
			oScroll.innerHTML += text;
			// scroll down the scrollbar
			oScroll.scrollTop = scrollDown ? oScroll.scrollHeight : oScroll.scrollTop;
		}
		
		$('throbber').style.display='none';
	}
	
	myRequest.evalScripts = true;
	
	myRequest.send('');
}