function toggleButton() {	
		if (document.forms["setin_webgis_disclamer"].elements["webgis_preso_visione"].checked == true) {
			document.forms["setin_webgis_disclamer"].elements["vai_al_webgis"].disabled = false;
		} else {
			document.forms["setin_webgis_disclamer"].elements["vai_al_webgis"].disabled = true;
		}
	}


document.write('<form name="setin_webgis_disclamer" action="http://webgis.setinsnc.it/maranoprincipato/" target="_blank" method="POST">');
document.write('<input type="checkbox" name="webgis_preso_visione" value="si" onclick="toggleButton()">Ho letto l\'informativa &nbsp;&nbsp;&nbsp;');
document.write('<input type="submit" name="vai_al_webgis" value="Vai al WebGIS" disabled></form>');