div#prehomelogo {position: relative;float: left;width: 370px;height: 400px;overflow-y: auto;}

div#prehometop {position: relative;float: left;width: 600px;height: 400px;overflow-y: auto;}

div#prehomechoose {position: relative ;float: left;width: 370px;height: 232px;background-color: #CEE927;text-align: center;}

div#prehomebottom {position: relative;float: left;width: 594px;height: 232px;padding-left: 6px;
background-image: url(http://www.polyrey.com/common/images/prehome/fond_bottom2.jpg) ;
}

div#prehomeblock1 {position: relative;float: left;width: 290px;height: 110px;margin: 2px;text-align: left;}
div#prehomeblock2 {position: relative;float: left;width: 290px;height: 110px;margin: 2px;text-align: left;}
div#prehomeblock3 {position: relative;float: left;width: 290px;height: 110px;margin: 2px;text-align: left;}
div#prehomeblock4 {position: relative;float: left;width: 290px;height: 110px;margin: 2px;text-align: left;}