function wokno(url,w,h) {
	window.open(url,"Obrazek", 'resizable,scrollbars,menubar=0,width='+(w+60)+',height='+(h+90));
}
function sm($sm) {
	this.document.newdisc.msg.value = this.document.newdisc.msg.value + $sm;
	this.document.newdisc.msg.focus();
}
function showmenu() {
	var object=document.getElementById("leftm");
	object.style.visibility="hidden";
	var obj=document.getElementById("leftme");
	obj.style.visibility="visible";
}
function hidemenu() {
	var object=document.getElementById("leftm");
	object.style.visibility="visible";
	var obj=document.getElementById("leftme");
	obj.style.visibility="hidden";
}
function showlogin() {
	var object=document.getElementById("login");
	object.style.visibility="hidden";
	var obj=document.getElementById("loginm");
	obj.style.visibility="visible";
}
function hidelogin() {
	var object=document.getElementById("login");
	object.style.visibility="visible";
	var obj=document.getElementById("loginm");
	obj.style.visibility="hidden";
}

function GetXmlHttpObject() {
	var xmlHttp=null;
	try {
		xmlHttp=new XMLHttpRequest();
	}
	catch (e) {
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}

function check_nick(str) {
	if (str.length==0) {
		return;
	}
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
		alert ("Zapnout JavaScript!");
		return;
	}
	var url="is_user.php";
	url=url+"?q="+str;
	url=url+"&sid="+Math.random();
	url=url+"&obj="+document.getElementById("obj").value;
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() {
	if (xmlHttp.readyState==4) {
		var resp=xmlHttp.responseText;
		if(resp==1) {
			var h=winH();
			var w=winW();
			var wl=w/2-150;
			var wt=h/2-50;
			var ask=document.getElementById("ask");
			ask.style.left=wl+'px';
			ask.style.top=wt+'px';
			ask.style.visibility='visible';
		}
	}
}

function winW() {
	if (window.innerWidth)
		return window.innerWidth;
	else if (document.documentElement && document.documentElement.clientWidth)
			return document.documentElement.clientWidth;
		else if (document.body && document.body.clientWidth)
			return document.body.clientWidth;
			else
				return null;
}

function winH() {
	if (window.innerHeight)
		return window.innerHeight;
	else if (document.documentElement && document.documentElement.clientHeight)
			return document.documentElement.clientHeight;
		else if (document.body && document.body.clientHeight)
			return document.body.clientHeight;
			else
				return null;
}

function clck(num) {
	document.getElementById("anonym").value=num;
	document.getElementById("ask").style.visibility='hidden';
}

function newdisc_nav() {
	document.getElementById("newdisc").style.visibility='visible';
	document.getElementById("newdisc").style.display='block';
	document.getElementById("newdisc_nav").style.visibility='hidden';
	document.getElementById("newdisc_nav").style.display='none';
}

function pagechange_up() {
	var stranka=document.getElementById("strankovani_up").value;
	var host=location.hostname;
	var url="http://"+host+"/disc.php?start="+stranka;
	this.window.location.href=url;
}

function pagechange_down() {
	var stranka=document.getElementById("strankovani_down").value;
	var host=location.hostname;
	var url="http://"+host+"/disc.php?start="+stranka;
	this.window.location.href=url;
}