How can I make the upload button consistent across browsers? _html/css_WEB-ITnose

This is the element . The display situation in each browser is completely different, especially IE and Firefox, as well as Chrome and Opera. How to deal with it is better,

Another thing is: What method is used to preview the uploaded image? Due to various browsers, it cannot be achieved with JS. Do you have any good methods to teach me?

Reply to discussion (solution)

Flash compatibility is better

Code
http://www.klstudio.com/post/182.html

Compatibility issues Learn the compatibility codes of each browser