function lib_open_img_window(src,width,height){ 
   if(width==0)
     width=500;
   width+=20;
   if(height==0)
     height=400;
   height+=20;
   if(height>600)
     height=600;
   var left = (screen.availWidth/2) - (width/2);
   var top = (screen.availHeight/2) - (height/2);
   info=window.open('/img_preview.php?src='+src,'info','resizable=1, scrollbars=1, toolbar=0, status=0, width='+width+', height='+height+', left='+left+', top='+top);
   info.focus();
 }
function lmenu(id, sep)
{
	var item_id=null;
	var sepr=null;
	
	 if (document.getElementById)     item_id = document.getElementById(id);
    else if (document.all)   item_id = document.all[id];
    else if (document.layers)   item_id = document.layers[id];
	
	if (document.getElementById)     sepr = document.getElementById(sep);
    else if (document.all)   sepr = document.all[sep];
    else if (document.layers)   sepr = document.layers[sep];
	
	if(item_id.style.display!='none')
	{
			item_id.style.display='none';
			sepr.src='/images/arrow_right.gif';
	}
	else{
			item_id.style.display='';
			item_id.visibility = 'show';
			sepr.src='/images/arrow_dn.gif';
	}
}