Ajax callback function return value processing when eval is problematic for people

Ajax callback function return value processing when eval is a problem, man.
Tested and processed successfully:

var res=eval ("(" [{"FID": "3", "Sid": "3", "Sonname": "Chemical"},{"content": '

Wwwwrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrqqq

'},{' content ": '

Wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww Wwww

'}]")");



Failed to detect processing (no execution): Var res=eval ("("

[{"FID": "3", "Sid": "Ten", "Sonname": "Four Chemistry"},{"content": '

'},{' content ": '

Dddddddddddddddddddddddddddddddddddddddddd

Sdddddddddddddddddddddddd

'}]

")");



Let's take a look at the Ajax return value and use Eval to deal with the second why not?

------Solution--------------------
JS string can not have line breaks, if must have to be escaped

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