var old = new Array();
function show_goodspic(id,type)
{
  if(old[type]!=null)
  {
	  document.getElementById(type+"b"+old[type]).style.display='none';
	  document.getElementById(type+"s"+old[type]).style.display='block';
	  //className
	  document.getElementById(type+"s"+old[type]).className='';
  }
      //document.getElementById(type+"s"+id).style.display='none';
	  document.getElementById(type+"b"+id).style.display='block';
	  //
	  document.getElementById(type+"s"+id).className='cur';
	  old[type] = id;
}