'JSON' is undefined' issue in IE but not chrome

Question

I am getting the following error with my jquery ajax call in IE9, where I am using Json.stringify().

Microsoft JScript runtime error: 'JSON' is undefined

The same function was working for me till yesterday and still works on my colleagues machine and on chrome on my machine. But for no apparent reason has stopped working on my machine today.

May you please help me understand, what is causing it?

Thanks!

Answer 1

the solution for me was to turn OFF compatibility mode by clicking the "torn page" icon to the right of the address bar.

Who knows how it got turned on in the first place!

Answer 2

You need to have your document is rendered in standards mode. See this one http://social.msdn.microsoft.com/Forums/en-US/iewebdevelopment/thread/fc41127c-0243-4d2e-8e7c-2b311f12e390.