when a user is given too many choices, it makes it harder for the user to make any choices
if it seems difficult to you, imagine what it will be like for a novice
"Only click the button once or you will be charged twice." Really? The developer of this site couldn’t take the time to disable that button after it was pressed?
Bootstrap is a toolkit from Twitter designed to kickstart development of webapps and sites.
It includes base CSS and HTML for typography, forms, buttons, tables, grids, navigation, and more.
Nerd alert: Bootstrap is built with Less and was designed to work out of the gate with modern browsers in mind.
This plugin uses XHR for uploading multiple files with progress-bar in FF3.6+, Safari4+, Chrome and falls back to hidden iframe based upload in other browsers, providing good user experience everywhere. To upload a file, click on the button below. Drag-and-drop is supported in FF, Chrome.