var http_request = false;

function CriaAjax(){
	http_request = null;
	if (window.XMLHttpRequest) { 
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	} else if (window.ActiveXObject) { 
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Sem suporte a Ajax!');
		return false;
	}
}

function CarregaUrl(url,div){
	CriaAjax();
	DirDiv = document.getElementById(div);
	DivTransparente = document;
	http_request.onreadystatechange = CarregaConteudo
	http_request.open('GET', encodeURI(url), true);
	http_request.send(null);
}

function CarregaUrlFrame(url,div){
	CriaAjax();
	DirDiv = parent.document.getElementById(div);
	DivTransparente = parent.document;
	http_request.onreadystatechange = CarregaConteudo
	http_request.open('GET', url, true);
	http_request.send(null);
}

function CarregaConteudo() {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			retorno = http_request.responseText;
			
			if(retorno == '') retorno = 'A pasta esta vazia.';
			
			DirDiv.innerHTML = retorno;
		} else {
			DirDiv.innerHTML = http_request.responseText;
			alert('Ocorreu um erro.');
		}
	} else {
		DirDiv.innerHTML = "<div style=\"text-align: center;\"><img src=\"imagens/carregando.gif\" alt=\"Carregando\" /></div>";
	}
}