Can anyone please tell me how to insert data into database without page refresh and without using any button. Facebook wall posts area is an example. User writes whatever he wants in input field and he has to press ENTER to submit the data into database instead of using a submit button. Can anyone please tell me how to insert data in
阅读背景：
如何在不使用任何按钮的情况下处理html中的表单？
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