function ApriApprofondimento(file,width,height,scrollbars) { 
var scrollbars='yes';
var width =400; 
var height =300; 
var l = Math.floor((screen.width-width)/2); 
var t = Math.floor((screen.height-height)/2); 
window.open(file,'_blank','top='+t+',left='+l+',width='+width+',height='+height+', resizable=yes,scrollbars='+scrollbars); 
}