function getObject(objectId) {
    if(document.getElementById && document.getElementById(objectId)) {

 return document.getElementById(objectId);
    } else if (document.all && document.all(objectId)) {

 return document.all(objectId);
    } else if (document.layers && document.layers[objectId]) {

 return document.layers[objectId];
    } else {
 return false;
    }
}

function displayList(n,dHeight){  
         var h = getObject('content'+ n).offsetHeight;
       var max_h = dHeight;
  
       
       var anim = function(){   
        h += 15;
        if(h >= max_h){ 
              getObject('content'+ n).style.height = dHeight;
              getObject('img'+ n).src="../images/jt-.gif";
              if(tt){window.clearInterval(tt);}
        }
        else{
                getObject('content'+ n).style.display="block";
                getObject('content'+ n).style.height = h + "px";
        }
      }
     var tt = window.setInterval(anim,2);
}

function hiddenList(n,dHeight){
       var h = getObject('content'+ n).offsetHeight;
     var anim = function(){
        h -= 15;
        
        if(h <= 5){
              getObject('content'+ n).style.display="none";
             getObject('img'+ n).src="../images/jt.gif";
             if(tt){window.clearInterval(tt);}
         }
         else{
             getObject('content'+ n).style.height = h + "px";
         }
     }
     var tt = window.setInterval(anim,2);
}

function showClassList(n,dHeight){
 var dHeight=dHeight
    if(getObject('content'+ n).style.display == "none"){ 
       hiddenList(n,dHeight); 
   }
   else{
    displayList(n,dHeight);  
  }
}

function showClassList(n,dHeight){
 var dHeight=dHeight
 
   if(getObject('content'+ n).style.display == "block"){ 

       hiddenList(n,dHeight); 
   }
   else{
    displayList(n,dHeight);  
  }
}