The form form on iOS how not to top the page after the input input method is aroused

there are two input input boxes on the rt: page. When the input method is called on the iphone, the page will be topped up, how to set it up so as not to be topped.
look up some solutions on the Internet, all with an input box at the bottom of the page, and then change fix to absolute, but in my case, there is an input, in the middle of the page, and even if the input box is still in the visual area after the input method is aroused, iphone is to top it on the Internet, do you have any solutions ~

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