http://www.codeproject.com/Articles/636701/jQuery-Promise-An-introduction-to-AJAX-with-multic
javascript deferred
转载于:https://www.cnblogs.com/daishuguang/p/3525454.html
http://www.codeproject.com/Articles/636701/jQuery-Promise-An-introduction-to-AJAX-with-multic
转载于:https://www.cnblogs.com/daishuguang/p/3525454.html