return contents of executed parsed urls to variables

[Lis]

Hi all,
i am making a DOM solution for displaying contents. My
problem is that i got a includet Javascript file *.js.
Within i builded my standart functions for use of any
page i code. I want to fill an array with contents of
the page that needs to be displayed.
The problem is now, that i simply cant exec the *.php
file and catch all echoes.
Yes, your way is right...
My thoughts are now, to execute the php as simple link
but i need to have something like pipes to return the
output to the variable.
This should normally work, couse of the serversidet
impementation form php scripts.

I'm new to Javascript, so i dont know where to start
my first steps and (how to || it gives) something like
(pipes || functions that return the value of executed urls
|| catch echos of files i execute)

Does someone can help me?
Greets Lis.