function summe()
{
	var n = 0;
	for (var i = 0; i < 6; i++)
	{
		if (document.forms[0].elements[i].checked)
			n = n+1;
	}
return n;
}

function check() {
if (summe()==0) {alert('Die Frage ist nicht beantwortet !');return false};
return true}


var OK=false;



function doOpen() {
window.location="solution.html";
return 1;
}