title: bootstrap drop-down menu auto dropup according to screen position?
body: <p>I was wondering if any of you has what I am asking for ready, to save me from the trouble. What I am looking for is for a dropdown menu to have the dropup class automatically added according to its position on the screen - and also change automatically when the user scrolls or resizes window.</p>
  
  <p>What I am looking for is already implemented in the bootstrap-select plugin, but the plugin is too 'heavy' to use.</p>