function bopener(URL)
{
	var sUrl, sName, sWidth, sHeight, sLeft, sTop, sResizable, sScrollbars;
	// estraggo l'url
	//sUrl = 'http://' + <%=  %>;
	sUrl = 'http://' + 'www.libero.it';
	//sUrl = 'http://' + URL;
	sName = null;
	sWidth = 860;
	sHeight = 640;
	sLeft = (screen.width/2) - 320;
	sLeft = sLeft - 320;
	sTop = (screen.width/2) 
	sTop = sTop - 320;
	sResizable = 'no';
	sScrollbars = 'yes';
	sLocation = 'yes';
	sToolbar = 'yes';
	sStatus = 'yes';
	
	window.open(sUrl,sName,'width='+sWidth+', height='+sHeight+', left='+sLeft+', top='+sTop+', resizable='+sResizable+', scrollbars='+sScrollbars+', location = '+sLocation+', toolbar='+sToolbar+', status='+sStatus+' ');

	void(0);
}