Web pages loading

I wonder why would it sometimes take the whole webpage to load or a large percentage of it before the browser displays it and sometimes the browser just displays whatever it has managed to load while keeping loading the rest of the page at the same time ?
what is the reason of the different behaviour ?
Is it just a browser behaviour or is there some directive to specify this ?

Regards,
-- Mohammed Hamed
Received on Tue Dec 29 1998 - 04:33:41 MST