.titPres1
{
    background-image: url(/media/de/presentation/presentation.png);
}
.Les1
{
    background-image: url(/media/de/presentation/les.png);
 }
.Env1
{
    width:370px;
    background-image: url(/media/de/presentation/env.png);
 }
.Cont1
{
    width:510px;
    background-image: url(/media/de/presentation/cont.png);
 }
.Conc1
{
    background-image: url(/media/de/presentation/conc.png);
 }
 
.Prog1
 {
    background-image: url(/media/de/presentation/programbg.png);
 }