Yes, it would. Just like a string of spaces " " == 0, but it isn't that bad; === is Javascript's version of == in other languages, and, thus, you should be using it if you don't want that wonkiness.
== is just for convenience, like when you want to make sure that the user didn't leave the form empty and the button shouldn't be greyed out, and other UI stuff. Without these kinds of features JS wouldn't be used in so many toolkits.