While I personally would prefer to put most JavaScript in an separate file, rather than sprinkled inline, it happens. So, why doesn't the browser handle this p

While I personally would prefer to put most JavaScript in an separate file, rather than sprinkled inline, it happens. So, why doesn't the browser handle this problem for us??? Why not have the browser drop all of the js script fragments and references into a queue, then run them later? Why make people reshuffle the stuff that they have working? Hell, for that matter, I'm a bit puzzled why js even runs before the document is ready anyway. Is there some user in a hurry to get his alerts and popup windows?