.overlay{
     display: none;
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: #000;
     z-index:1001;
     opacity:.75;
     -moz-opacity: 0.75;
     filter: alpha(opacity=75);
}

.modal {
     display: none;
     position: absolute;
     top: 20%;
     left: 25%;
     width: 780px;
     height: 376px;
     background: #fff;
     color: #333;
     z-index:1002;
     overflow: auto;
}

body{
	margin-top: 0px;
	padding-top: 0px;     
}