It is possible to turn on your javascript for certain website and turn off your javascript for others...
For all people who have firefox, you can install NoScript.

Why turn off javascript?
Look here.

NoScript, What is that? recheck-IMG-tag-Code!
NoScript turn off javascript for all website, excepted some websites allowed. You create this list of websites allowed.
NoScript is available in French, English, Russian, ... .
At the end of this page , you can find all available languages.

I have installed NoScript today then I can't help you for advanced options
but I can help in the basic function.

Installation
First, download NoScript here, install and follow instructions.

Notice :
You can choose your language (french, english,...) at the end of the page.
It's the official website of Mozilla for add-ons.
All add-ons on this web site are totally reliable.


After the installation
When you go on a website where you would like turn on your javascript :
1. right click on recheck-IMG-tag-Code!
2. click on "allow website" or "temporary allow website".

An little example :
Go here.
On this site, there are pictures.
Click on one picture and look... .
On imagefap, you can't see pictures if your javascript are off.
To view the enlarge picture, turn on javascript for this site.
To view the enlarge picture, to turn on your javascript for this site, right click on recheck-IMG-tag-Code! and click on "allow temporary imagefap.com".
Illustration : recheck-IMG-tag-Code!
Try again, click on one picture (on imagefap.com).
You can view picture. It means that your javascript is turn on for this site (imagefap.com).

NB :
What means "allow temporary imagefap.com"?
Javascript is turn on for imagefap.com until you close firefox.
What means "allow imagefap.com"?
Javascript is turn on for imagefap.com all time.