本文实例为大家分享了Bootstrap组合上下拉框的具体代码,供大家参考,具体内容如下 <html> <head> <meta charset=utf-8> <meta http-equiv=X-UA-Compatible content=IE-edge> <meta name=viewport content=width=device-width,initial-scale=1> <title>Bootstrap 101 Template</title> <link href=http://cdn.b