function apri_popup(URL, w, h)
  {
    x = (screen.width - w) / 2;
    y = (screen.height - h) / 2;
        
    window.open(URL,'','width='+w+',height='+h+',top='+y+',left='+x+',scrollbars=yes');    	  
  }
  
function apri_popup_dillo_ad_un_amico()
  {
    URL = "http://www.portogruaro1.net/utilities/dillo/index.php";
    w = 500;
    h = 400;
    x = (screen.width - w) / 2;
    y = (screen.height - h) / 2;
        
    window.open(URL,'','width='+w+',height='+h+',top='+y+',left='+x+',scrollbars=yes');    	  
  }
  
function apri_popup_segnala_un_errore()
  {
    URL = "http://www.portogruaro1.net/utilities/segnala/index.php";
    w = 500;
    h = 400;
    x = (screen.width - w) / 2;
    y = (screen.height - h) / 2;
        
    window.open(URL,'','width='+w+',height='+h+',top='+y+',left='+x+',scrollbars=yes');    	  
  }