var cq = 1;           
  var fq = 41;           
  var sd = 1;           
  var ep = 0;           
           
function nq(val) {
	var allok = true;
	var inp_type = document.getElementById("vopr" + val + "t").value;
	if (inp_type == "t") {
		allok = document.getElementsByName("vopr" + val)[0].value.length > 0;
	} else if (inp_type == "r") {
		var group = document.getElementsByName("vopr" + val);
		var radiook = false;
		for (var i=0; i<group.length; i++) {
			if (group[i].checked) {
				radiook = true; 
			}
		}
		allok = radiook;
	}

	if (allok == false) {
		alert('Вы не ответили');
		return false;
	}
 
	cq = val + 1;           
	if (cq > fq) { cq = fq; }  
	hideit(cq - 1);
	showit(cq);       
	if (cq == fq) {           
		var itm = document.getElementById('control-buttons');           
		itm.style.display="none";           
	}           
 
}
           
function showit(cq) {           
   var itm = document.getElementById("ss-" + cq);           
   itm.style.display="block";           
}           
           
function hideit(cq) {           
   var itm = document.getElementById("ss-" + cq);           
   itm.style.display="none";           
}