Load jQuery/jQuery UI dependencies

jQueryBookmarklet.coffee

loadDependencies = (callback) ->
  requirements = {jq: '1.6.1', jqui: '1.8.7'}

  getScript = (url, next) ->    
    script = document.createElement('script')
    script.src = url
    head = document.documentElement.childNodes[0]
    script.onload = script.onreadystatechange = onScriptLoad script, next
    head.appendChild script

  onScriptLoad = (script, next) ->
    ->
      return unless script.onload
      if !@readyState or @readyState is 'loaded' or @readyState is 'complete'
        next()
        script.onload = script.onreadystatechange = null
        head.removeChild script

  if not ($ = window.jQuery) or requirements['jq'] > $.fn.jquery
    getScript 'http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.js', ->
      getScript 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/jquery-ui.js', ->
        callback window.jQuery.noConflict(1)
  else
    if not (jqui_version = windows.jQuery.ui.version) or requirements['jqui'] > jqui_version
      getScript 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/jquery-ui.js', ->
        callback window.jQuery.noConflict(1)
    else
      callback window.jQuery.noConflict(1)

loadDependencies ($) ->
  # Your code goes here:
  alert "jq: #{$.fn.jquery}, jqui: #{$.ui.version}"

Based on http://stackoverflow.com/questions/6535641/using-jquery-ui-in-a-bookmarklet/6551580#6551580