gistfile1.js

// the below doesn't work when IE7's privacy settings are set to block 3rd party cookies
$('.got-question').click(function(){
    if (typeof(window.olark) !== "undefined") {
        //olark is present
    }
    else {
        //olark is absent
    }
});

// This is the solution suggested by Joe @ Olark
alert($('#habla_window_div').height());