.i1
{
	background:url(../images/i2.jpg);
	background-position:top-left;
	background-repeat:no-repeat;
	background-size:cover;
	color:white;
	background-attachment:fixed;
	width: 100%; /* Full width */
    height: 500px; /* Fixed height */
}

.four
{
	background:url(../images/i1.jpg);
	background-position:center;
	background-repeat:no-repeat;
	background-size:cover;
	color:white;
	background-attachment:fixed;
	width: 100%; /* Full width */
    height: 500px; /* Fixed height */
}

.overlay
{
	background-color:rgba(0,0,0,0.6);
	width:100%;
	height:500px;

}