var str;var val11;var val12;var val13;var val14;var val15;
var s;


function setValToNull (){val11=0;val12=0;val13=0;val14=0;val15=0; return true}

function sum () {return val11+val12+val13+val14+val15}


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



var OK=false;

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