jquery.gracefullEffect.js

// Usage:
//  $('div').gracefullEffect('slideDown')

$.fn.gracefullEffect = function(effectName) {
  fallbacksMap = {
    slideDown: 'show',
    slideUp: 'hide'
    // ...
  }
  if ($.support.trailingWhiteSpace) {
    $(this)[effectName]()
  } else {
    effect = fallbacksMap[effectName]
    $(this)[effect]()
  }
    
}