function get_cookie(Name) {
  var search = Name + "="
  var returnvalue = "";
  if (document.cookie.length > 0) {
    offset = document.cookie.indexOf(search)
    // if cookie exists
    if (offset != -1) { 
      offset += search.length
      // set index of beginning of value
      end = document.cookie.indexOf(";", offset);
      // set index of end of cookie value
      if (end == -1) end = document.cookie.length;
      returnvalue=unescape(document.cookie.substring(offset, end))
      }
   }
  return returnvalue;
}

function movepic(img_name,img_src) {
document[img_name].src=img_src;
}
function enable_toggle(id)
{
	aux=document.getElementById(id);
	if ((aux.style.display=="") ||  (aux.style.display=="none")) 
	{
		aux.style.display='block';
		document.cookie='port_submenu=1';
	}
		else 
	{	
		aux.style.display='none';
		document.cookie='port_submenu=2';
	}	
}

function init()
{
	if (get_cookie("port_submenu")=="1")
	{
		enable_toggle('port_submenu');
	}
}