Reading JSON string in Java script

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ASP.NET

Javascript

jQuery

Hi,

I called server method from java script using page methods, and the server method return JSON String (result) like this

{"errorString":not found ,"obj":[[{"VideoId":1,"VideoName":"C sharp ","WebSite":"You tube","VideoLink":"www.youtube.com","Description":"This is C Sharp Tutorial"},{"VideoId":2,"VideoName":"VB .net","WebSite":"You tube","VideoLink":"www.youtube.com","Description":"This is VB.net Tutorial"}]]}

Please let me know how to read this json string in java script.

I am trying to read like this

alert(result.errorString)
alert(result.obj[0].VideoId)

but I am not getting

Thanks in advance