function flip( rid ) {
	
	opis=new Array();
	opis[0] = "str0";
	opis[1] = "str1";
	opis[2] = "str2";
	opis[3] = "str3";
	opis[4] = "str4";
	opis[5] = "str5";
	opis[6] = "str6";
	opis[7] = "str7";
	
	link=new Array();
	link[1] = "link1";
	link[2] = "link2";
	link[3] = "link3";
	link[4] = "link4";
	link[5] = "link5";
	link[6] = "link6";
	link[7] = "link7";
	
	for (i=0;i<=7;i++) {
	
		obj = document.getElementById(opis[i]);
		obj.style.display = 'none';
		
		if (i>0) {
			obj = document.getElementById(link[i]);
			obj.setAttribute("class","czyste");
		}
	}
	
	obj = document.getElementById(opis[rid]);
	obj.style.display = 'block';
	
	obj = document.getElementById(link[rid]);
	obj.setAttribute("class","zaznaczone");
}