function ventana1(URL){ 
window.open(URL,"ventana1","width=720, height=860, scrollbars=yes, menubar=no, location=no, resizable=no") 
} 
function ventanapolitica (URL){ 
window.open(URL,"ventana_politica","width=600, height=400, top=100, scrollbars=yes, menubar=yes, location=no, resizable=yes") 
}
function ventanamapa (URL){ 
window.open(URL,"ventana_mapa","width=1000, height=600, scrollbars=yes, menubar=yes, location=no, resizable=yes") 
}
function finestra_pagina (URL){ 
window.open(URL,"ventana_pagina","width=720, height=690, scrollbars=yes, menubar=no, location=no, resizable=no") 
}