Mine

function checkfieldss(strng) {
  var error = "";

  for(var i = 0; i < strng.elements.length; i++){
if(strng.elements[i].value.length == 0){
	error = "<li>No value entered in "+strng.elements[i].name+"</li>";
	strng.elements[i].focus();
	return error;
		}
	}
}