实用的JQuery插件——select2。 select2是对select下拉框的改进。如果你对界面的美感又一定要求，你一定会抛弃select，坚决的选择select2阵营。 select2的使用非常简单。我将它在项目中的应用总结成了两个demo，你一定会为它的简单实用大为震惊。-Practical JQuery plugin- select2. Select2 is an improvement on the　drop down box. If you have a certain sense of the interface of the interface, you must abandon select, and resolutely choose select2 camp. The use of select2 is very simple. I will be in the application of the project summary of the two demo, you will be a simple and practical for the shock.