ns = (document.layers)? 1:0; // Netscape 4.x
	   ie = (document.all)? 1:0; // Internet Explorer e Opera
	   ns6 = (document.getElementById)? 1:0; // Netscape 6
	 
   function load(page) 
		{
		if (ns) document.scrollWindow.document.testo.src = page;
		if (ie) parent.textFrame.document.location = page;
		if (ns6) parent.textFrame.document.location = page;
        }