[Lecseus]

function kontroll(){
		var vastus=document.getElementsByName("v1"); //по имени радиокнопки name="#"
			if(vastus[0].checked && vastus[1].checked && vastus[3].checked){ // вписывает индекс ответа, счет с 0
				document.getElementById("otvet1").innerHTML="верно";
				document.getElementById("otvet1").style.color="green";
				correct++;
				
			}
			if(vastus[0].checked && vastus[1].checked && vastus[2].checked && vastus[3].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
			if(vastus[0].checked && !vastus[1].checked && !vastus[2].checked && !vastus[3].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
			if(!vastus[0].checked && vastus[1].checked && !vastus[2].checked && !vastus[3].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
			if(!vastus[0].checked && !vastus[1].checked && !vastus[2].checked && vastus[3].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
			if(vastus[0].checked && vastus[1].checked && !vastus[3].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
			if(vastus[0].checked && vastus[3].checked && !vastus[1].checked && !vastus[2].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
			if(vastus[1].checked && vastus[3].checked && !vastus[0].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
			if(!vastus[0].checked && !vastus[1].checked && !vastus[2].checked && !vastus[3].checked){
				document.getElementById("otvet1").innerHTML="неверно";
				document.getElementById("otvet1").style.color="red";
			}
	};

допустим