Set page tab content height - height

Question

How can I set the hight for my page tab content that is from a google site? It works fine, I just want the vertical scroll bars not to be longer than the actual facebook page size.
The code I'm using now
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
// init the FB JS SDK
FB.init({
appId : '576155032405795', // App ID from the app dashboard
});
FB.Canvas.setAutoGrow();
};
// Load the SDK asynchronously
(function(d, s, id){
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>

Answer 1

You may want to look into the setAutoGrow() or setSize() functions of JavaScript SDK. Both may help you but you will have to judge which one to use, from the setAutoGrow()'s documentation
This function is useful if you know your content will change size, but you don't know when. There will be a slight delay, so if you know when your content changes size, you should call setSize yourself (and save your user's CPU cycles).
and from setSize()'s documentation
Call this whenever you need a resize. This usually means, once after pageload, and whenever your content size changes.
So you need to judge accordingly.
Edit
I would like you to use setAutoGrow() function in your code. You will need to put this code in the page that is been rendered within the Page Tab. And as you have mentioned that is your content is retrieved from page within your Google sites, then this is where you would be required to add the code.
You will have to insert the following code within your page just after the body opening tag
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
// init the FB JS SDK
FB.init({
appId : 'YOUR_APP_ID', // App ID from the app dashboard
channelUrl : '//WWW.YOUR_DOMAIN.COM/channel.html', // Channel file for x-domain comms
});
FB.Canvas.setAutoGrow();
};
// Load the SDK asynchronously
(function(d, s, id){
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
Here the channel.html will contain just the following line of code
<script src="//connect.facebook.net/en_US/all.js"></script>