/********************************************/
/* BIBLIOTEKA Cross-Browser DHTML           */
/* wersja 1.0         1999-02-19            */
/********************************************/
/* onFocus Dynamic Web Design               */
/* http://www.webmedia.pl/onfocus/          */
/* mailto:onfocus@webmedia.pl               */
/********************************************/
/* Ania Kreglewska: akreglew@elka.pw.edu.pl */
/* Pawel Postupalski: pawelek@webmedia.pl   */
/********************************************/
/* Ta biblioteka moze byc wykorzystywana    */
/* bez zadnych ograniczen pod warunkiem     */
/* zachowania tej informacji.               */
/********************************************/

/*************************/
/* Detekcja przegladarki */
/*************************/
nn4 = (document.layers) ? true:false;
ie4 = (document.all) ? true:false;

/**********************/
/* Pokaz blok 'ident' */
/**********************/
function show(ident) {
	if(nn4) {	
		document.layers[ident].visibility = "show";
	} else if(ie4) {	
		document.all[ident].style.visibility = "visible";
	}
}

/**********************/
/* Ukryj blok 'ident' */
/**********************/
function hide(ident) {
	if(nn4) {	
		document.layers[ident].visibility = "hide";
	} else if(ie4) {
		document.all[ident].style.visibility = "hidden";
	}
}

/****************************************/
/* Przesun blok 'ident' do punktu (x,y) */
/****************************************/
function moveTo(ident,x,y) {
	if(nn4) {
		document.layers[ident].left = x;
		document.layers[ident].top = y;
	} else if(ie4) {
		document.all[ident].style.left = x;
		document.all[ident].style.top = y;
	}
}

/*****************************************/
/* Przesun blok 'ident' o wektor [dx,dy] */
/*****************************************/
function moveBy(ident,dx,dy) {
	if(nn4) {
		document.layers[ident].left = document.layers[ident].left  + dx;
		document.layers[ident].top = document.layers[ident].top + dy;
	} else if(ie4) {
		document.all[ident].style.left = document.all[ident].style.pixelLeft + dx;
		document.all[ident].style.top = document.all[ident].style.pixelTop + dy;
	}
}

/************************************************/
/* Przytnij blok 'ident' do zadanego prostokata */
/*     t: top, r: right, b: bottom, l:left      */
/************************************************/
function clipTo(ident, t, r, b, l) {
	if(nn4) {
		document.layers[ident].clip.top = t;
	    	document.layers[ident].clip.right = r;
    		document.layers[ident].clip.bottom = b;
	    	document.layers[ident].clip.left = l;
	} else if(ie4) {
    		document.all[ident].style.clip = 
				"rect(" + t + " " + r + " " + b + " " + l + ")";
	}
}

/****************************************************/
/* Zmien przyciecie bloku 'ident' o zadane wartosci */
/*     t: top, r: right, b: bottom, l: left         */
/****************************************************/
function clipBy(ident, t, r, b, l) {
	if(nn4) {
		document.layers[ident].clip.top += t;
		document.layers[ident].clip.right += r;
		document.layers[ident].clip.bottom += b;
		document.layers[ident].clip.left += l;
	} else if(ie4) {
		ie_clip = document.all[ident].style.clip;
		ie_clip = ie_clip.substring(5, ie_clip.length-1);
		ie_clip_wart = ie_clip.split("px");
		t += parseInt(ie_clip_wart [0]);
		r += parseInt(ie_clip_wart [1]);
		b += parseInt(ie_clip_wart [2]);
		l += parseInt(ie_clip_wart [3]);
			
		document.all[ident].style.clip = 
			"rect(" + t + "px " + r + "px " + b + "px " + l + "px)";
	}
}

/***********************************************************/
/* Zapisz pozycje bloku 'ident' do zmiennych l:left, t:top */
/***********************************************************/
function pozycja(ident) {
	if(nn4) {
		l = document.layers[ident].left;
		t = document.layers[ident].top;
	} else if(ie4) {
		l = document.all[ident].style.pixelLeft;
		t = document.all[ident].style.pixelTop;
	}
}

/******************************************************/
/* Zapisz wysokosc bloku 'ident' do zmienej h: height */
/******************************************************/
function wysokosc(ident) {
	if(nn4) {
		h = document.layers[ident].document.height;
	} else if(ie4) {
		h = document.all[ident].scrollHeight;	
	}
	return h;
}

/****************************************/
/* Sprawdz rozmiary okna. Zapisuje:     */
/*   oknoW: dostepna szerokosc          */
/*   oknoH: dostepna wysokosc           */
/****************************************/
function okno(){
	if(nn4){
		oknoW=window.innerWidth-16;
		oknoH=window.innerHeight
	}else if(ie4){
		oknoW=document.body.offsetWidth-20;
		oknoH=document.body.offsetHeight
	}
}