function irekae(akstn){
 	document.forms[0].menu.length = sk[akstn].length
	for(var i=0; i < sk[akstn].length; i++){
		document.forms[0].menu.options[i].text = skm[akstn][i];
		document.forms[0].menu.options[i].value = sk[akstn][i];
	}
	document.forms[0].menu.options[0].selected = true
}

function setnumback(){
        document.forms[0].menu.length = 7;
}

function go(menu) {
        URL = menu.options[menu.selectedIndex].value;
        var i="";
        for (i=0; i < menu.length; i++){
                if (menu.options[i].defaultSelected == true) {
                        menu.options[i].selected = true;
                }
        }
        location = URL;
}