function popup(url, name, width, height, scrollbars, status) 
{ 
if (document.all) { 
var x = window.screenLeft; 
var y = window.screenTop; 
var w = window.document.body.offsetWidth; 
var h = window.document.body.offsetHeight; 
} 
else { 
var x = window.screenX; 
var y = window.screenY; 
var w = window.outerWidth; 
var h = window.outerHeight; 
} 
var cntx = x + Math.round((w - width) / 2); 
//var cnty = y + Math.round((h - height) / 2); 
var cnty = 100;

window.open (url, name, 'left=' + cntx + ', top=' + cnty + ', width=' + width + ', height=' + height + ', scrollbars='+scrollbars+', resizable=yes, status='+status+' +' ); 
} 

function chiudi() {
	window.self.close()
}