jQuery下拉框美化插件selectList是一款简单、轻量级、跨浏览器的jquery下拉框模拟插件，支持键盘操作选项、支持ESC关闭下拉框。-jQuery dropdown widget selectList landscaping is a simple, lightweight, cross-browser plug-in analog jquery drop-down box, keyboard support options, support ESC to close the dro