#container {
  display:block;
  width: 997px;
  text-align:left;
  clear:left;
  margin:0px auto;
}
#containershadow{
  position:relative;
  background-color:#888888;
  bottom: 7px;
  right: 7px;
}

#containercontent{
  position: relative;
  bottom: 7px;
  right: 7px;
  background-image:url(/images/skin/decos/bg.gif);
  border-width:1px;
  border-style:solid;
  border-color:#000000;
  min-height:600px;
}

#centerpage{
 display:block;
 float:left;
 width:604px;
  margin-left:3px;
}




#columnarticle{
  display:block;
  float:left;
  width:181px;
  text-align: center;
}

#columnright{
  display:block;
  float:left;
  width:181px;

}

#top{
  display:block;
  background-image:url(/images/domain/hautbg.jpg);
  background-repeat:no-repeat;
  background-position:0px 0px;
  width:995px;
  height:149px;
  overflow: hidden;
}


#distance {
    width:1px;
    height:20px;
    float:left;
}


#menudiv{
  width:200px;
  display:block;
  float:left;
}

#detaildiv{
  width:790px;
  display:block;
  float:left;
}

#dummydiv{
  display: none;
  width: 0px;
  height: 0px;
  position: absolute;
  margin: 0 auto;
}

#masterdiv{
  display:block;
  text-align:left;
  width:100%;
  height:100%;
}

#customimagediv{
  text-align:left;
  background-color:#FFFFFF;
  width:100%;
  height:100%;
}

#centrediv{
  text-align:center;
  font-family: Arial, Helvetica, sans-serif;
}


.centerdiv , .center , .centermain
{
  display:block;
  margin: 0px auto;
  text-align:center;
}

.centermain
{
  margin-right:16px;
}

.leftdiv
{
  text-align:left;
  margin: 0px;
}

.listlargeur{
  width:100px;
}


#mainfiller{
  display:block;
  clear:left;
  height:5px;
}
.filler{
  display:block;
  clear:left;
  height:1px;
}
<div class="corpscentrelong">