function fb() {
	if(!("console" in window) || !("firebug" in console)) {
		var names = ["log", "debug", "info", "warn", "error", "assert", "dir", "dirxml", "group", "groupEnd", "time", "timeEnd", "count", "trace", "profile", "profileEnd"];
		window.console = {};
		for(var i = 0; i < names.length; i++) {
			window.console[names[i]] = function() {};
		}
	}
	if(window.console.firebug) {
		//alert("bla");
		document.getElementById("fb").style.visibility = "visible";
		document.getElementById("fb").style.display = "block";
	}
}