var over_flag=new Array();

function mover(id)
{
  if(!over_flag[id])
  {
    document.getElementById('bg_'+id).src='/pic/item_a.png';
    document.getElementById('menu_'+id).style.display='block';
    roll_over(id);
  }
  
  over_flag[id]=true;
}

function roll_over(id)
{
  if(document.getElementById('description_'+id).offsetHeight<document.getElementById('description_'+id).firstChild.offsetHeight)
  {
    document.getElementById('description_'+id).style.height=(document.getElementById('description_'+id).offsetHeight+1)+'px';
    setTimeout("roll_over('"+id+"')", 20);
  }
}


function mout(id)
{
  over_flag[id]=false;
  setTimeout("roll_out('"+id+"')", 100);
}

function roll_out(id)
{
  if(!over_flag[id])
  {
    document.getElementById('bg_'+id).src='/pic/item.png';
    document.getElementById('menu_'+id).style.display='none';
    document.getElementById('description_'+id).style.height='1px';
  }
}