function lock_this_topic(topic_id) { 
	
	icons = lock_unlock("http://rzeznia.eu/qlut.php?mode=lock&topic_id="+topic_id);
	icons = icons.split('<ICONS>');
	reply_icon = '<img border="0" src="'+icons[0]+'">';
	unlock_icon = '<a href="javascript:unlock_this_topic('+topic_id+')"><img border="0" src="'+icons[1]+'"></a>';
	document.getElementById('reply_img').innerHTML = reply_icon; 
	document.getElementById('lock_unlock').innerHTML = unlock_icon; 
}

function unlock_this_topic(topic_id) {

	icons = lock_unlock("http://rzeznia.eu/qlut.php?mode=unlock&topic_id="+topic_id);
	icons = icons.split('<ICONS>');
	reply_icon = '<img border="0" src="'+icons[0]+'">';
	lock_icon = '<a href="javascript:lock_this_topic('+topic_id+')"><img border="0" src="'+icons[1]+'"></a>';
	document.getElementById('reply_img').innerHTML = reply_icon;
	document.getElementById('lock_unlock').innerHTML = lock_icon;  
}

function lock_unlock(file) {
	if(window.XMLHttpRequest) 
		{ xhr_object = new XMLHttpRequest(); }
	else if(window.ActiveXObject)
		{ xhr_object = new ActiveXObject("Microsoft.XMLHTTP"); }
	xhr_object.open("GET", file, false); 
	xhr_object.send(null); 
	if(xhr_object.readyState == 4) { return(xhr_object.responseText); }
	else { return(false); }
}