Possibilities

Tests.FBResize.js

window.onload = function() {
    FB.Canvas.setSize({ height: $(window).outerHeight() });
}

window.onload = function() {
    setTimeout(function(){
        FB.Canvas.setAutoGrow();
    },1000);
}

window.onload = function() {
    setTimeout(function(){
        FB.Canvas.setAutoGrow();
    },1000);
}

$(window).load(function() {
    var window_height = $('body').outerHeight();
    FB.Canvas.setSize({ height: window_height });
});

window.onload = function() {
    var window_height = $('body').outerHeight();
    FB.Canvas.setSize({ height: window_height });
});