*{
    margin:0;
}
html{
    height:100%;
}
body{
    /* IE7以降,モダンブラウザ用 */
    width:100%;
    min-width:760px;
    min-height:500px;
    /* ここまで */
    height:100%;
    position:relative; 
    background-color:#eeeeee;
}
#body{
    width:760px;
    height:500px;
    position:absolute;
    bottom:50%;
    right:50%;
}
#main{
    width:760px;
    height:500px;
    position:absolute;
    top:250px;
    left:380px;
	border-top:black solid 10px;
	border-bottom:black solid 10px;
	border-left:red solid 3px;
	border-right:red solid 3px;
	/*    background-color:green;
    border:black solid 5px;
*/
}