#bloc1{
	width:305px;
	height:245px;
	position:absolute;
	top:0px;
	left:0px;
	overflow:hidden !important;
}

#bloc2{
	width:305px;
	height:245px;
	position:absolute;
	top:0px;
	left:320px;
	overflow:hidden !important;
}

#bloc3{
	width:305px;
	height:245px;
	position:absolute;
	top:265px;
	left:0px;
	overflow:hidden !important;
}

#bloc4{
	width:305px;
	height:245px;
	position:absolute;
	top:265px;
	left:320px;
	overflow:hidden !important;
}