var str;
var val1;var val2;var val3;var val4;var val5;
var s;
function myDate (){current = new Date( ); s = current.toString( );return s}

function setValToNull (){val1=0;val2=0;val3=0;val4=0;val5=0; return true}

function sum () {return val1+val2+val3+val4+val5}


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



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