// JavaScript Document
function ligacao(){
	var ligar	= null;
	try{
		ligar	= new XMLHttpRequest();
	}catch(e){
		try{
			ligar	= new ActiveXObject("Msxml2.XMLHTTP");
		}catch (e){
			ligar	= new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return ligar;
}