#pci, #pross, #bios, #div3, #connectique, #cg , #inout, #ram , #chip, #alim{
top :100px;
margin-left : 35px;
position : absolute;
width:188;
visibility:hidden;
}

#boutons {
top :100px;
margin-left : 35px;
position : absolute;
width:188;
}