function ys53_drop_shadow(id){

  var last=3;
  var obj=document.getElementById(id);
  var strings = obj.innerHTML;
  obj.innerHTML="";
  for(i=last;i>=0;i--){
    kage="<DIV class='shadow shadow"+i+"' STYLE=left:"+(last-i)*2+"px;top:" +(last-i)*2+"px;";
    if(i==0)kage +="color: black";
    kage +=">"+strings+"</DIV>";
    obj.innerHTML+=kage;
  }
}