The effect property must be the name of a jquery ui effect. If duration or easing is omitted, then the default values will be used. You may also consider implementing dialogs using popup widgets. Focus not placed in dialog when its opened in a change event in ie. For nearly a week i was trying to do a confirmation dialog for a delete item event on a wordpress table. The jquery ui widget factory is an extensible base on which all of jquery ui s widgets are built. Whether youre building highly interactive web applications or you just need to add a date picker to a form control, jquery ui is the perfect choice. This acts as the middleman between the object created by. Widgets widgets are featurerich, stateful plugins that have a full lifecycle, along with methods and events.