function pokaz(id) {
/* autor: mgr inz. Lukasz Krain */
	var item = null;
	var item1 = null;
	var z;

	item = document.getElementById(id);
	itemlink = document.getElementById(id+"link");

	for(z=1;z<4;z++){
		id1="mitem"+z;
		item1 = document.getElementById(id1);
		item1.style.display = "none";
	}
	item.style.display = "";

	link1 = document.getElementById("mitem1link");
	link2 = document.getElementById("mitem2link");
	link3 = document.getElementById("mitem3link");
	
	link1.style.background = "url(/images/p_01.jpg) right";
	link2.style.background = "url(/images/p_01.jpg) right";
	link3.style.background = "url(/images/p_02.jpg) right";
	
	if(id == "mitem1"){
		link1.style.background = "url(/images/p_04.jpg) right";
	}
	
	if(id == "mitem2"){
		link1.style.background = "url(/images/p_03.jpg) right";
		link2.style.background = "url(/images/p_04.jpg) right";
	}
	
	if(id == "mitem3"){
		link2.style.background = "url(/images/p_03.jpg) right";
		link3.style.background = "url(/images/p_05.jpg) right";
	}
}