http://jsfiddle.net/sxGtM/3/

http://stackoverflow.com/questions/1184624/convert-form-data-to-js-object-with-jquery

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/*把表单转成json,并且name为key,value为值*/   $.fn.serializeObject =  function ()   {       var  o = {};       var  a =  this .serializeArray();       $.each(a,  function () {           if  (o[ this .name] !== undefined){               if  (!o[ this .name].push) {                   o[ this .name] = [o[ this .name]];               }               o[ this .name].push( this .value ||  '' );           }  else  {               o[ this .name] =  this .value ||  '' ;           }       });