#bloc {
 width: 582px;
 height: 618px;
 background: url(../images/convention.jpg);
 margin: 10px auto; padding :0;
 position: relative;
 }
 
 #bloc li {margin: 0; padding: 0; list-style: none; display: block; position: absolute;}
 
 #bloc a {display: block;}
 
 #bloc1 {left: 255px; top: 268px; width: 40px; height: 38px;}
 #bloc2 {left: 194px; top: 328px; width: 36px; height: 41px;}
 #bloc3 {left: 293px; top: 279px; width: 37px; height: 38px;}
 #bloc4 {left: 225px; top: 345px; width: 34px; height: 38px;}
 #bloc5 {left: 340px; top: 303px; width: 38px; height: 39px;}
 #bloc6 {left: 7px; top: 230px; width: 166px; height: 26px;}
 #bloc7 {left: 9px; top: 314px; width: 143px; height: 26px;}
 #bloc8 {left: 397px; top: 219px; width: 94px; height: 39px;}
 #bloc9 {left: 10px; top: 381px; width: 119px; height: 26px;}
 #bloc10 {left: 464px; top: 286px; width: 91px; height: 37px;} 
 
 a:hover {border-style : outset}
  
 #bloc1 a {height: 38px;}
 #bloc2 a {height: 41px;}
 #bloc3 a {height: 38px;}
 #bloc4 a {height: 38px;}
 #bloc5 a {height: 39px;}
 #bloc6 a {height: 26px;}
 #bloc7 a {height: 26px;}
 #bloc8 a {height: 39px;}
 #bloc9 a {height: 26px;}
 #bloc10 a {height: 37px}