Stop HTML/JavaScript Page From Loading Mid Initialization

So imagine a piece of Javascript as the first script on a page along the lines of

var MySuperObject = new (function () {
this.SuperObjectInit();
})();

Now imagine that everything that proceeds this script (or a large portion therein) requires the SuperObject to have met its load conditions and loaded correctly.

Assuming for whatever reason the loading of the object fails I need to abort loading the rest of the page and the scripts in particular.

I know the majority of you are going to scream why not have your function issue a callback onSuccess and onFailed but the problem is this is in a ASP.Net project with masterpages, nestedmasterpages, usercontrols and so forth (each of which have their own dependencies and scripts); rendering such an approach problematic.

The other option (I assume) is to use window.location = "myErrorPage.html"; but I dont like the idea of having to create another page for an error message or the fact that it causes a redirect.

What I am hoping to do is something along the lines of

StopLoadingPage();
document.write("Error has occurred");