Ajax + JSON Summary (1)

Recently, JSON Ajax is used in many projects... Write some notes .. Or a possible solution.
One by one:
JSON problems:
Multi-layer JSON nesting solution: the result is JSON
VaR _ result = eval ('+ Result + ')');
VaR _ DATA = new array ();
For (VAR item in _ result) _ data. Push (_ result [item]);
VaR _ verify = _ DATA [1];
Convert to an array before performing the subscript operation
PS: This project is fine, with only two layers of nesting .. I don't know if the bug will continue after more layers.

Ajax:
Ajax is usually used with many forms,
Here we reference a jq attribute var Params =$ ('form'). serialize ();
Params will be a set returned by all names in the form.

In addition, the data obtained by Ajax is large, and the request time is long... It may have an impact on the page layout, so we should make preparations.