#bloc1{
	width:410px;
	height:315px;
	position:absolute;
	top:0px;
	left:0px;
	overflow:hidden !important;
}

#bloc2{
	width:410px;
	height:315px;
	position:absolute;
	top:0px;
	left:420px;
	overflow:hidden !important;
}

#bloc3{
	width:410px;
	height:170px;
	position:absolute;
	top:335px;
	left:0px;
	overflow:hidden !important;
}

#bloc4{
	width:410px;
	height:170px;
	position:absolute;
	top:335px;
	left:420px;
	overflow:hidden !important;
}