Do popular smartphone browsers have JavaScript enabled by default?

Do the stock browsers that come with the following smartphone platforms have JavaScript enabled by default/out-of-the-box?

• Android
• iOS
• Blackberry
• Windows P开发者_Python百科hone 7

• Android: yes
• iOS: yes
• Blackberry: no, or in a very limited fashion.
• Windows Phone 7: yes

Here's a question on stackoverflow dealing with blackberry javascript: Javascript not working on Blackberry