function ChangeOp(id,base,opacity) {

               var d = document.getElementById(id);

               if (base == 0) { var NewOp = opacity; NewOp++;}
               else           { var NewOp = opacity; NewOp--; }

               var OpMoz = (NewOp / 10);
               var OpEx  = (NewOp * 10);

               d.style.filter  = 'alpha(opacity='+OpEx+')';
               d.style.opacity = ''+OpMoz+'';

               if (base == 0 ) {
                if (opacity == 0) {  d.style.display=''; d.style.filter='alpha(opacity=1)'; d.style.opacity=0.1; }
                if (NewOp < 10)   { setTimeout("ChangeOp('"+id+"','"+base+"','"+NewOp+"')",20); }
               }
               else {
                if (NewOp > 0) { setTimeout("ChangeOp('"+id+"','"+base+"','"+NewOp+"')",20); }
                else           { d.style.display='none'; }
               }
            }


        function masque(id){
         var d = document.getElementById(id);
            if (d.style.display=='none') {   ChangeOp(id,0,0);   }
            else                         {   ChangeOp(id,10,10);   }
        }