function na_restore_img_src(name, nsdoc)
	{
		var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
		if (name == '') return;
		if (img && img.altsrc)
		{
			img.src    = img.altsrc;
			img.altsrc = null;
		}
	}

	function na_change_img_src(name, nsdoc, rpath, preload)
	{
		var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
		if (name == '') return;
		if (img)
		{
			img.altsrc = img.src;
			img.src    = rpath;
		}
	}

	function na_open_window(name, url, left, top, width, height, toolbar, menubar, statusbar, scrollbar, resizable)
	{
		toolbar_str = toolbar ? 'yes' : 'no';
		menubar_str = menubar ? 'yes' : 'no';
		statusbar_str = statusbar ? 'yes' : 'no';
		scrollbar_str = scrollbar ? 'yes' : 'no';
		resizable_str = resizable ? 'yes' : 'no';
		window.open(url, name, 'left='+left+',top='+top+',width='+width+',height='+height+',toolbar='+toolbar_str+',menubar='+menubar_str+',status='+statusbar_str+',scrollbars='+scrollbar_str+',resizable='+resizable_str);
	}