formCheck1 = function() {
 if(document.getElementById('requirements_yes').checked == true) {
  document.getElementById('requirements_yes_specific').disabled = false; 
 } else {
  document.getElementById('requirements_yes_specific').disabled = true;
 }
}

formCheck2 = function() {
 if(document.getElementById('agree_information').checked == true
	&& document.getElementById('agree_dataprotection').checked == true
	&& document.getElementById('agree_declaration').checked == true) {
  document.getElementById('submitbutton').disabled = false;
 } else {
  document.getElementById('submitbutton').disabled = true; 
 }
}