Hide browser refresh

hello, i’m new to web apps and how things work on the web. is there a way in javascript to hide the browser refresh button or maybe the entire browser toolbar? i have an external application form and it takes about 20 minutes to complete. i’m trying to make it somewhat mistake proof, but the refresh clears all the fields and reloads. i have disbled the right click menu on the page load and disabled the F5 key, but have no idea how to do this to the browser refresh button. any suggestions will be greatly appreciated.

thanks,

jason