function aprifinestra(modo)
{
switch (modo)
        {
        case 1:
                {
                window.open('opere1.htm', 'Popup', 'menubar=no, scrollbars=no, left=30, top=150, width=500, height=450')
                break
                }
        case 2:
                {
                window.open('opere2.htm', 'Popup', 'menubar=no, scrollbars=no, left=30, top=150, width=500, height=450')
                break
                }
        case 3:
                {
                window.open('opere3.htm', 'Popup', 'menubar=no, scrollbars=no, left=30, top=150, width=500, height=450')
                break
                } 
		case 4:
                {
                window.open('opere4.htm', 'Popup', 'menubar=no, scrollbars=no, left=30, top=150, width=500, height=450')
                break
                }
		case 5:
                {
                window.open('opere5.htm', 'Popup', 'menubar=no, scrollbars=no, left=30, top=150, width=500, height=450')
                break
                }
		case 6:
                {
                window.open('opere6.htm', 'Popup', 'menubar=no, scrollbars=no, left=30, top=150, width=500, height=450')
                break
                } 
		}
}