function var_dump(obj, saida) {
		var out = '';
		for (var i in obj) {
			out += i + ": " + obj[i] + "\n";
		}
		
		if ( typeof saida == 'undefined' )
			saida = "html";
		
		if (saida == "alert") {
			alert(out);
		} else 
			if (saida == "html") {
				var pre = document.createElement('pre');
				pre.innerHTML = out;
				document.body.appendChild(pre)
		}
	}