function Menue(menu_nr) {
    noMenue_explizit("NavMenu1","Nav1");
    noMenue_explizit("NavMenu2","Nav2");
    noMenue_explizit("NavMenu3","Nav3");
    noMenue_explizit("NavMenu4","Nav4");
    noMenue_explizit("NavMenu5","Nav5");
    noMenue_explizit("NavMenu6","Nav6");
    noMenue_explizit("NavMenu7","Nav7");

    if (menu_nr==1) nav="1";
    if (menu_nr==2) nav="2";
    if (menu_nr==3) nav="3";
    if (menu_nr==4) nav="4";
    if (menu_nr==5) nav="5";
    if (menu_nr==6) nav="6";
    if (menu_nr==7) nav="7";

    nav_menu = "NavMenu"+nav;
    nav      = "Nav"+nav;
    
    TopOffset = 2;
    if(DOM) {
	if(MS) getElem("id",nav_menu,null).style.top = TopOffset+3; 
	else   getElem("id",nav_menu,null).style.top = window.pageYOffset + TopOffset;
    }
    if(DOM || MS) {
	if (!DOM) getElem("id",nav_menu,null).style.top = TopOffset;
	if (OP)   {
	  getElem("id",nav_menu,null).style.pixelTop  = TopOffset+8;
	  OP_left = Math.ceil(getElem("id",nav_menu,null).style.pixelLeft/10)-1;
	  getElem("id",nav_menu,null).style.pixelLeft = OP_left*10+7;
        }
	getElem("id",nav_menu,null).style.visibility = "visible";
    }
    else if(NS) {
	getElem("id",nav_menu,null).visibility = "show";
	getElem("id",nav_menu,null).top = window.pageYOffset + TopOffset;
    }
    if(DOM || MS) getElem("id",nav,null).style.visibility = "hidden";
}

function noMenue(menu_nr) {
    if (menu_nr==1) noMenue_explizit("NavMenu1","Nav1");
    if (menu_nr==2) noMenue_explizit("NavMenu2","Nav2");
    if (menu_nr==3) noMenue_explizit("NavMenu3","Nav3");
    if (menu_nr==4) noMenue_explizit("NavMenu4","Nav4");
    if (menu_nr==5) noMenue_explizit("NavMenu5","Nav5");
    if (menu_nr==6) noMenue_explizit("NavMenu6","Nav6");
    if (menu_nr==7) noMenue_explizit("NavMenu7","Nav7");
}

function noMenue_explizit(nav_menu,nav) {
    if(DOM || MS) getElem("id",nav,null).style.visibility = "visible";
    if(DOM || MS) getElem("id",nav_menu,null).style.visibility = "hidden";
    if(NS)        getElem("id",nav_menu,null).visibility = "hide";
}