[Dilettante_Pro]

var src = {"cont":[{"type":"text"}],"name":[{"type":"text"}],"tedt":"sdf","cont3":[{"type":"всякая хрень","id":32424,"text":"sfsdf"},{"type":"всякая хрень","id":32424,"text":"sfsdf"},{"type":"всякая хрень","id":32424,"text":"sfsdf"}]}
var i = 0;
for(var key in src) {
   if(i == 3) { 
       var arr = src[key];
       for (var j = 0; j<arr.length; j++) {
          var obj = arr[j];
          for(var k in obj) {
              alert(k +":" + obj[k]);
          }
       }
   }
   i++;
}