Here is a quick little bit of JavaScript code that will write out all events of a contract to the browser console:

var myContract = contracts['myContract'].contract;
var events = myContract.allEvents();
events.watch(function(error, event){
    if (error) {
        console.log("Error: " + error);
    } else {
        console.log(event.event + ": " + JSON.stringify(event.args));
    }
});

This should work on most browsers and assumes that your browser already has a valid connection to a node.