//Выпадающее меню
<!--//--><![CDATA[//><!--
	jsHover = function() {
		var hEls = document.getElementById("nav").getElementsByTagName("li");
		for (var i=0, len=hEls.length; i<len; i++) {
			hEls[i].onmouseover=function() { this.className+=" jshover"; }
			hEls[i].onmouseout=function() { this.className=this.className.replace(" jshover", ""); }
		}
	}
	if (window.attachEvent && navigator.userAgent.indexOf("Opera")==-1) window.attachEvent("onload", 

jsHover);
//--><!]]>

//показать/скрыть блок-----------------
	function hideShow(id) {
		
		block = document.getElementById(id);
		
		if (block.style.display == 'none') {
			block.style.display = '';
		} else {
			block.style.display = 'none';
		}
		
	}