function getElementsByClassName(oElm, strTagName, strClassName){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	var oElement;
	for(var i=0; i<arrElements.length; i++){
		oElement = arrElements[i];
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}

function menu (id, link)
{
    var starci = getElementsByClassName(document.getElementById("menu"), "ul", "zobrazmenu" );
    if (starci[0]) {
        starci[0].className="";
    }
    var starci = getElementsByClassName(document.getElementById("menu"), "li", "active2" );
    if (starci[0]) {
        starci[0].className="";
    }
    
    var stare = document.getElementById("6666");
    if (stare) {
        //alert(stare.href);
        stare.id="";
        stare.style.textDecoration="none";
    }
    document.getElementById(id).className="zobrazmenu";
    link.id="6666";
    link.style.textDecoration="underline";
    //document.getElementById(id).parentNode.className="active2";
}

function mainmenu (id)
{
    if (id == 'rattan') {
        document.getElementById('rattanbutton').className="active"
        document.getElementById('nabytekbutton').className="";
        document.getElementById('rattanmenu').className="zobrazmenumain"
        document.getElementById('nabytekmenu').className="";
    }
    if (id == 'nabytek') {
        document.getElementById('rattanbutton').className=""
        document.getElementById('nabytekbutton').className="active";
        document.getElementById('rattanmenu').className=""
        document.getElementById('nabytekmenu').className="zobrazmenumain";
    }
}