*, *:before, *:after { -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; }
* {padding: 0; margin: 0;}
body {font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 1.4;}
.main {float: left; position: absolute; width: 100%; height: 100%; top: 0; bottom: 0; left: 0; right: 0;}
.selectFrame {float: left; width: 100%; height: 50px;}
.selectFrame select {margin:15px auto; width: 100px; display: block;}
.showFrame {position: absolute; width: 100%; top: 50px; left: 0; right: 0; bottom: 0;}
.showFrame iframe {border: 1px solid #ccc; width: 100%; height: 100%; position: absolute; top: 0; left: 0; right: 0; bottom: 0;}
label{display: none;}