var theDoc=document,
    theAll=theDoc.all?theDoc.all:null,
    isDOM=theDoc.getElementById?true:false,
    isOpera=navigator.userAgent.toLowerCase().indexOf("opera")!=-1,
    isntShowHideOK=(!isDOM && theAll==null) || isOpera;

var HiddenLayers=new Array();

function InitShowHide() {
	for (var i=0; i<HiddenLayers.length; i++)
		ShowHideLayer(HiddenLayers[i],false);
}

function ShowHideLayer(name, state) {
	if (isntShowHideOK) return null;
	var obj=isDOM?theDoc.getElementById(name):theAll[name];
	obj.style.display=(state=arguments.length>=2?
		state:state=obj.style.display=="none")?"block":"none";
	return state;
}

function ShowHideClick(name, desc1, desc2, islink) {
	desc1=unescape(desc1); desc2=unescape(desc2);

	var state=ShowHideLayer(name);
	if (!islink) {
		var but=document.forms[name+'__form'].
			elements[name+'__button'];
		but.value=(state)?desc1:desc2;
	} else if (!isOpera) {
		var link=isDOM?
			theDoc.getElementById(name+'__link'):
			theAll[name+'__link'];
		link.innerHTML=(state)?desc1:desc2;
	}

	;
}

function addShowHideButton(name, desc1, desc2, state, islink, alt, before,
                           after) {
	if (isntShowHideOK) {
		if (arguments.length>=6 && alternative!=null)
			theDoc.write(alt);
		return;
	}
	switch (arguments.length) {
		case 0: return;
		case 1: desc1 =null;
		case 2: desc2 =null;
		case 3: state =null;
		case 4: islink=null;
		case 6: before=null;
		case 7: after =null;
	}
	if (desc1 ==null) desc1 ='Show layer';
	if (desc2 ==null) desc1 ='Hide layer';
	if (state ==null) state =true;
	if (islink==null) islink=false;

	if (before!=null)
		theDoc.write(before);
	if (!islink)
		theDoc.write('<form name="'+name+'__form"><input name="'+
			name+'__button" type="button" value="'+
			(state?desc1:desc2)+'" onclick="ShowHideClick(\''+
			name+'\',\''+escape(desc1)+'\',\''+escape(desc2)+
			'\', false);" /></form>');
	else
		theDoc.write('<a class="rozwijanie" href="#" onclick="ShowHideClick(\''+name+
			'\',\''+escape(desc1)+'\',\''+escape(desc2)+
			'\', true); return false;" id="'+name+'__link">'+
			(state?desc1:desc2)+'</a>');
	if (after!=null)
		theDoc.write(after);

	if (!state)
		HiddenLayers[HiddenLayers.length]=name;
}