html external sheets

[heshan]

I'm new to this forum, a complete newbie, but I was wondering how I can tell my html page to open another html page and read what is in the new page for that specific section.

For example: I have google ads on the right side of my website, where I would put the ad, is there a way to link it to another html script without actually putting it in my html page?

Kinda like a CSS sheet but the other way around. I don't want to have to go through every page to change the ad code, I just want to change an external sheet where the ad code is.

I also want to do this for the body of my website where the content is. Can I link a external sheet that would input content into the body of the website?

[Lee_the_Bee]

Sounds like you would benefit from using php includes.
Assuming you have a half decent host that runs php.

Create pages for ads, navigation, header, footer etc. with extension .php

ad1.php
ad2.php
navigation.php
header.php
footer.php

Then pop some code like this where you want it

<?php include("ad1.php"); ?>

You may need to fuss with your settings to allow php to function. Sometimes it's easiest to just make .php the extension for all pages. Otherwise you need to fuss with the .htaccess file to add handlers adding a line like this

AddType application/x-httpd-php .html