关于去除刷新的提示

<form action="" method="post">刷新时会弹出提示框，问是否重新发送请求，若改为method=get则不会有该提示，以下是post和get的一些区别

• post请求无长度限制（至少是理论上的）
• get有长度限制，最长不超过2048字节

When using the post method, there is no theoretical limit to the amount of data that can be sent to the HTTP server. The amount of data may be constrained by the physical limits of the client computer.

When using the get method to send data to an HTTP server, the amount of data that can be sent is limited by the maximum length of a URL. In this case the URL cannot be longer than 2048 bytes.