function abreSite(width, height, nome,janela) {
	var top; var left;
  	top = ( (screen.height/2) - (height/2) )
  	left = ( (screen.width/2) - (width/2) )
	window.open(nome, janela,"toolbar=0,location=0,directories=0,status=0,menubar=0,resizable=1,maximized=0,scrollbars=1,width="+width+	
				",height="+height+",left="+left+",top="+top);

}

function formatar(mascara, documento){
  var i = documento.value.length;
  var saida = "#";
  var texto = mascara.substring(i);
  if (somenteNumeros(documento)){
	  if (texto.substring(0,1) != saida){
		documento.value += texto.substring(0,1);
	  }
  }
  
}


function somenteNumeros(e){
	if (document.all) // Internet Explorer
		var tecla = event.keyCode;
	else if(document.layers) // Nestcape
		var tecla = e.which;
		if (tecla > 47 && tecla < 58) // numeros de 0 a 9
			return true;
		else
			{
				if (tecla != 8) // backspace
					event.keyCode = 0;
					//return false;
				else
					return true;
			}
}