Notes on json returned by ajax using js! _javascript skills

Copy code The code is as follows:

var result = unescape(xmlhttp.responseText);
var j = eval("(" result ")");

Not possible var j = eval( result );

JSON (JavaScript Object Notation) is a simple data format that is more lightweight than xml. JSON is a native JavaScript format, which means that processing JSON data in JavaScript does not require any special API or toolkit.

The rules of JSON are simple: an object is an unordered collection of "name/value pairs". An object starts with "{" (left bracket) and ends with "}" (right bracket). Each "name" is followed by a ":" (colon); "name/value" pairs are separated by a "," (comma). For specific details, please refer to http://www.json.org/json-zh.html