var nIdServer = Math.floor((Math.random()*8 + 1));
var naoDisponiveis = "";
var todos = "12345678";

while (naoDisponiveis.indexOf(todos.charAt(nIdServer - 1)) >= 0) {
   nIdServer = Math.floor((Math.random()*8 + 1));
}

document.write("<form class='email' action='http://webmail" + nIdServer +
	 ".click21.com.br/horde/imp/redirect.php/' method='post' name='implogin' target='_top'>");

document.write("<input class='senha' type='HIDDEN' name='server' value='webmail" +
	 nIdServer + "-priv.click21.com.br'/>");
document.write("<input class='senha' type='HIDDEN' name='namespace' value='INBOX.' />");
document.write("<input class='senha' type='HIDDEN' name='folders' value />");
document.write("<input class='senha' type='HIDDEN' name='maildomain' value='click21.com.br' />");