php and <div> tag

Hi.
I am making a site that has two columns using <div> tag, the one to the left is going to be the menu, and the other the main window.

I'm using the php 'include' command to load a menu.php on the left <div>, and a welcome page in the main <div>.

The object is now to get links from the menu to show in the main window.

From menu.php:

Code:

---

<a href="http://www.google.com" target="main">Google</a>

---

This should load google in the <div> main, but nothing happens.

How do I get the main <div> to include whatever gets called from a link from the menu?

[edit]rephrase: I'm trying to send a link from menu.php to the <div class="main"> which is defined in index.php[/edit]

I'm rusty on my HTML but I think you need a pound sign to target an area in the same html document.

so

Code:

---

<a href="http://www.google.com" target="#main">Google</a>

---

might work.