How to change a browsed page's <input>?

问题

I'm jQuery beginner. I'm trying to modify the source code of a page I'm browsing, using Firefox plus Greasemonkey.

How can I modify:

<input id="HiddenCategory" type="hidden" name="PageCategory"></input>

to:

<input id="HiddenCategory" type="text" name="PageCategory" value="OTHER"></input>

?

回答1:

Something like this?

$("#HiddenCategory").attr("type", "text").val("OTHER");

This is untested but i think it should work ok.

来源：https://stackoverflow.com/questions/19085007/how-to-change-a-browsed-pages-input