function HelpCenter_AbrirInterface(chave, nome, email, observacoes)
{
	var width = 710;
	var height = 550;
	var left = ((screen.availWidth - width) / 2) - 3;
	var top = ((screen.availHeight - height) / 2) - 11;

	if (!nome)
		nome = "";
	if (!email)
		email = "";
	if (!observacoes)
		observacoes = "";

	window.open("http://helpcenter.webaula.com.br/atendimento/Login.aspx?chave="+chave+"&nome="+nome+"&email="+email+"&observacoes="+observacoes+"&referer="+escape(document.location.href),"HelpCenter","width="+width+",height="+height+",left="+left+",top="+top+"")
}