function katalog_ukryj(co)
{
	var img = document.getElementById('i'+co);
	menu_zmiana_img(img);
	
	menu_schowaj(co);
    //document.getElementById('menu_'+co+'*').style.display = "none";
}

function katalog_zmiana_img(img)
{
var strona = 'http://' + location.host;
    if (img.src == strona + '/images/icony/plusbottom.gif') {img.src = strona + '/images/icony/minusbottom.gif';}
	else if (img.src == strona + '/images/icony/minusbottom.gif') {img.src = strona + '/images/icony/plusbottom.gif';}
	else if (img.src == strona + '/images/icony/plus.gif') {img.src = strona + '/images/icony/minus.gif';}
	else if (img.src == strona + '/images/icony/minus.gif') {img.src = strona + '/images/icony/plus.gif';}
	else {alert(img.src);}
}

function katalog_schowaj(co)
{
	var element = document.getElementById('d'+co);
	a = (element.style.display == "none") ? "block" : "none";
   	element.style.display = a;
}