.head{ height:30px; line-height:30px; position:relative;}
.head h4{padding-left:10px; margin-right:200px;}
.head span{ position:absolute; top:0; right:50px;}
.frame{ width:100%; height:800px; background:#FFFFFF; z-index:-10;}
.demo-top{ position:absolute; top:0; bottom:0;  width:100%; text-align:center;  height:30px; line-height:30px; font-size:21px; font-weight:bold;}
.demo-bottom{  width:100%; text-align:center;  height:30px; line-height:30px; font-size:21px; font-weight:bold;}
/*filter:alpha(opacity=30);opacity:0.3;-moz-opacity:0.3;*/