here there is the flotjs navigationcontrol plugins:
https://github.com/Jeff-Tian/jquery.flot.navigationControl
the documentation says: "To make the control symbols (+, -, ←, ↑, →, ↓, ⌂) more beautiful, you may include your own icon fonts css file, the symbols have the css class 'icon' for you to hook."
I want to use the bootstrap icons for this purpose:
http://getbootstrap.com/components/#glyphicons-glyphs
but I cannot understand how to bind the class "icon" and the tag "span" (for the bootstrap Glyphicons) in the css.