#greyBoxDiv {  
    position: fixed;    
    top:0;
    left:0;
    background-color:#000;  
    filter:alpha(opacity=50);  
    -moz-opacity: 0.5;  
    opacity: 0.5;
    padding:20px;
    height:100%;
    width:100%;
    z-index:998;
}

* html #greyBoxDiv { /* ie6 hack */       
    height: expression(document.body.scrollHeight > document.body.offsetHeight ? document.body.scrollHeight : document.body.offsetHeight + 'px');
    width: expression(document.body.scrollWidth > document.body.offsetWidth ? document.body.scrollWidth : document.body.offsetWidth + 'px');
}
#moviePlayerDiv {
    background:black;
    width:500px;
    height:375px;
    position:fixed;
    top:50%;
    left:50%;
    margin-top:-180px;
    margin-left:-250px;
    z-index:999;
}
#movieDivClosebox {
    fontFamily:arial;
    color:blue;
    background:white;
    fontSize:14px;
    position:fixed;
    cursor:pointer;
    width:40px;
    text-align:right;
    top:50%;
    left:50%;
    margin-top:200px;
    margin-left:210px;
    z-index:999;
}