var txt = window.getSelection();
alert(txt.length); // returns undefined because txt isn’t a string.

What is it? A ham? Why, it’s the getSelection object!

So, instead, must do this:
var txt = new String(window.getSelection());
alert(txt.length); // returns the length of the selected text

I’ve seen some cases where people have coded this:
var txt = window.getSelection()+”; //concatenate an empty string

I think the “new String()” is a more elegant solution and you’ll at least know what you have.

This should fix the hoverSmack context menu for Firefox and possibly Safari. It apparently doesn’t work in IE7 beta 2.