function showDiv(obj,num,len)
{
 for(var id = 1;id<=len;id++)
 {
  var ss=obj+id;
  var sss=obj+"a"+id;
  if(id==num){
  try{$("#"+ss).fadeIn("slow");$("#"+sss).addClass("on")}catch(e){};
  }else{
  try{$("#"+ss).hide();$("#"+sss).removeClass("on")}catch(e){};
  }
 }  
}

function pn(x){
$("#pn").val(x);
$("#pg").submit();
}