function clear_form(elem){
  var forms_select = (document.getElementById('form_hidden')) ? (document.getElementById('form_hidden').value) : "";
	if(forms_select.indexOf(elem.name) >= 0){}
	else {
		forms_select += elem.name + ", ";
		elem.value = "";
	}	
	document.getElementById('form_hidden').value = forms_select;

}
function clear_empty(){
	  var forms_select = (document.getElementById('form_hidden').value) ? (document.getElementById('form_hidden').value) : "";
	  var elem = document.getElementById('inquiry');
		if(forms_select.indexOf(elem.name) >= 0 && elem.value != "" ){
		}else elem.value="";
	  var elem = document.getElementById('kontakt_name');
		if(forms_select.indexOf(elem.name) >= 0 && elem.value != "" ){
		}else elem.value="";
		

		return true;
 }