// JavaScript Document
function conecta() {
	if (typeof XMLHttpRequest != "undefined")
		return new XMLHttpRequest();
	else if (window.ActiveXObject)
	{
		var versoes = ["MSXML2.XMLHttp.5.0",
					   "MSXML2.XMLHttp.4.0", "MSXML2.XMLHttp.3.0",
                       "MSXML2.XMLHttp", "Microsoft.XMLHttp"];
	}
	for (var i = 0; i < versoes.length; i++)
	{
		try{
			return new ActiveXObject(versoes[i]);
			}catch (e) {}
	}
	throw new Error("Seu browser nao suporta AJAX");
}