.iFrame_1 {text-align: center; 
		width: 1460px;
		height: 680px; 
		margin: 0 auto;
		background-color:#f1f1f1;
		overflow:hidden;
		 z-index: 4;
		border:0;
		}
		
		.iFrame_2 {text-align: center; 
		margin: 0 auto;
		background-color:#f1f1f1;
		overflow:hidden;
		width:320px;
		height:100px;
		border:0;
		}