function Pokaz (secNum){
secNum = document.getElementById(secNum);
if (secNum.style.display=="none"){secNum.style.display="";}
else{secNum.style.display="none";}
}

sfHover = function() {
	var sfEls = document.getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
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			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);