function aprifinestra(modo)
{
switch (modo)
        {
        case 1:
                {
                window.open('certificato1.htm', 'Popup', 'menubar=no, scrollbars=no, left=260, top=100, width=400, height=570')
                break
                }
        case 2:
                {
                window.open('certificato2.htm', 'Popup', 'menubar=no, scrollbars=no, left=260, top=100, width=400, height=570')
                break
                }
        case 3:
                {
                window.open('certificato3.htm', 'Popup', 'menubar=no, scrollbars=no, left=260, top=100, width=400, height=570')
                break
                }
		case 4:
                {
                window.open('cartina.htm', 'Popup', 'menubar=no, scrollbars=no, left=260, top=100, width=600, height=350')
                break
                }
			}
	}