The method of parse () parsing json in JS

IE7 will appear JSON undefined, solution reference can be;

1,parse (): Convert a string to JSON (the form of a JSON (standard JSON form) that can be turned into a string)
Attributes in a string are strictly enclosed in quotes

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var str = ' {' name ': ' Hello '} '; Security, must be strict JSON var json = json.parse (str);

Example

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function Strtojson (str) { return Json.parse (str); }

2,stringify (): Converts JSON to a string
will automatically add the double quotes

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var json={' left ': MB, ' top ': 200} var str=json.stringify (JSON); Alert (typeof (str))

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Although the function of eval () is very powerful, it is not very much used in practice.
Eval: Turn the string into JS (executable JS code)
Eval: Any string can be turned, security is not very good