function menuctrl(_name,_state)
{
	if (navigator.appName!='Netscape') 
	{
	  document.all[_name].style.visibility=_state;
	}
	else 
	{
		if (parseInt(navigator.appVersion) < 5) return;
		document.getElementById(_name).style.visibility=_state;
	}
}
function show_img(_url,_w,_h){
	window1=window.open("","","width="+_w+",height="+_h);
  window1.document.open();
  window1.document.write('<img style="position: absolute; top: 0px; left: 0px" src="'+_url+'">');
  window1.document.close();
}