function TT(Obj) {
  var dat = new Array("MB");
  for(var i=0;i< dat.length;i++) {
    var AA = document.getElementById(dat[i]);
    var AAimg = document.getElementById(dat[i]+"mark");
    var Onimg="img/s2.gif"; var Offimg="img/s1.gif";
      if( AA.id == Obj ) {
        if ( (AA.style.display == "none" ) || (!AA.style.display) ) {
                AA.style.display = "block"; AAimg.src = Onimg;
        } else {
                AA.style.display = "none"; AAimg.src = Offimg;
        }
      } else {
        AA.style.display = "none";  AAimg.src = Offimg;
      }
 }
}