function chVis(sw,id) {
  	if (sw == 1) {
	document.getElementById(id).style.visibility = 'visible';
	}
	else {
	document.getElementById(id).style.visibility = 'hidden';
	}
}

function replyTo(id,name,date,child,tpid) {
	
	document.getElementById('idr').value = id;
	if(child == 1) {
		document.getElementById('trl').value = name;
		document.getElementById('tpid').value = tpid;
	}
	else {
		document.getElementById('trl').value = '';
		document.getElementById('tpid').value = '';
	}
	document.getElementById('to').innerHTML = 'Reakce na: <b>' + name + '</b> - ' + date + ' - <b><a onclick="cancelReply()" class="ruka">zrušit</a></b>';
}

function cancelReply() {
	
	document.getElementById('idr').value = 0;
	document.getElementById('to').innerHTML = '';
	document.getElementById('trl').value = '';
	document.getElementById('tpid').value = '';
}

function setHeight() {
	
	for ($i = 1; $i < 2; $i++) {
	
    var hVal = document.getElementById('resize'+$i).offsetHeight;
	
	if (hVal%2)
		document.getElementById('resize'+$i).style.height = (hVal-14) +"px";
	else
		document.getElementById('resize'+$i).style.height = (hVal-13) +"px";
		
	}
}

var xHttp;

function sendRate(rate,id){

	var result = document.getElementById(id);
	result.innerHTML = "<div></div>";
    saveRate("http://www.symbi.cz/save-rate.php?r=" + rate + "&id=" + id,id);
}

function saveRate(dataSource,id) {
	
	var id = id;
	xHttp = VytvorXMLHttp();
    xHttp.open("GET", dataSource);
    xHttp.onreadystatechange = function() {
    	if (xHttp.readyState == 4 && xHttp.status == 200)
        {
        	var result = document.getElementById(id);
            result.innerHTML = xHttp.responseText;
        }
    }
    xHttp.send(null);
}

function VytvorXMLHttp() 
{
   var xmlHttp= false;
   if (window.ActiveXObject) 
      {xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");}
   else if (window.XMLHttpRequest) 
       {xmlHttp = new XMLHttpRequest();}
   return xmlHttp
}

var xxHttp;

function getUsername(){

	var username = document.getElementById("usrname");
    var result = document.getElementById("result");
    result.innerHTML = "<div></div>";
    unameControl("../username-control.php?u=" + username.value);
}

function unameControl(dataSource) {

	xxHttp = VytvorXMLHttp();
    xxHttp.open("GET", dataSource);
    xxHttp.onreadystatechange = function() {
    	if (xxHttp.readyState == 4 && xxHttp.status == 200)
        {
        	var result = document.getElementById("result");
            result.innerHTML = xxHttp.responseText;
        }
    }
    xxHttp.send(null);
}