How to change the text of the "Go" button on iPhone virtual keyboard in Safari?

I know thi开发者_开发技巧s is easy in Cocoa. Not sure if it is possible in Safari.

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That's not entirely accurate. Upon some research I discovered that if you set the input's type attribute to "search" for example, the Go button will read "Search":

Mobile Safari - Input field submit button

This is visible in mobile Yahoo and mobile Google.

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You can't change safari. It's not possible.