FlowupLabels.js 实现了表单输入框的标签在输入框获得焦点时自动上浮的效果。在线演示。

$('.FlowupLabels').FlowupLabels({          /*          These are all the default values          You may exclude any/all of these options          if you won't be changing them           */          // Handles the possibility of having input boxes prefilled on page load          feature_onInitLoad: false,             // Class when focusing an input          class_focused:      'focused',          // Class when an input has text entered          class_populated:    'populated'   });

项目主页：http://www.open-open.com/lib/view/home/1385600728875