function openWindowScroll (url,titulo,pop_size_w,pop_size_h) {
	var posicaoX = screen.width - pop_size_w;
	var posicaoY = screen.height - pop_size_h;
	if(posicaoX != 0)
	{
		posicaoX = Math.round(posicaoX / 2);
		posicaoY = Math.round(posicaoY / 2);
	}
	pop = window.open(url,titulo,"toolbar=no,location=no,address=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,maximized=yes,width="+pop_size_w+",height="+pop_size_h+",left="+posicaoX+",top="+posicaoY);
}
<!-- Fim da Função da Tim -->
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
var bookmarkurl="http://www.melhordovolei.com.br" 
var bookmarktitle="Melhor do Vôlei - Seu guia de Vôlei na Internet" 
function marcador() 
{ 
window.external.AddFavorite(bookmarkurl,bookmarktitle) 
}

// ----------------- menu -----------------//
function menuMostraDiv(xMenu){
   document.all[xMenu].style.visibility= "visible";
}
function menuEscondeDiv(xMenu){
   document.all[xMenu].style.visibility= "hidden";
}