说明：  jQuery实现select下拉框样式美化效果，这是个挺实用的网页美化技巧，现在jquery很流行，用它不但可以实现交互的Ajax效果，同时也可用来美化表单元素，像下拉框，单选框，复选框以及文本框等，本代码就是一个美化Select的实例，希望朋友们下载一起研究。
(jQuery the drop-down box style landscaping to achieve the effect, it is a very practical web landscaping techniques, jquery now very popular, with the effect that it can not only interact with Ajax, but also can be used to beautify the form elements, such as drop-down boxes, radio buttons, complex boxes and text boxes, etc. this code is an instance Select beautification, I hope my friends download study together.)