function switch_visibility(element_id, display_type) {
   
   var el_form = document.getElementById(element_id);

   switch (display_type) {
      case "block":
         break;
      case "table":
         display_type = "table-row";
         break;
      default:
         display_type = "block";
      }

   if (el_form.style.display == "none") {
      el_form.style.display = display_type;
      }
   else {
      el_form.style.display = "none";
      }
}

function check_order_form() {
   var terms_checkbox = document.getElementById('terms_agreement');
   var terms_submit = document.getElementById('ordersend');

   if (terms_checkbox.checked)
      terms_submit.disabled = false;
   else
      terms_submit.disabled = true;
}

function show_checque(radio){
	
	var checque1 = document.getElementById('checque1');
	var checque2 = document.getElementById('checque2');
	var checque = document.getElementById('order_pay4');
	
	if (checque.checked==true){
    if (checque1.style.display == "none") checque1.style.display="";
    if (checque2.style.display == "none") checque2.style.display="";
  }
  
  if (checque.checked==false){
    if (checque1.style.display == "") checque1.style.display="none";
    if (checque2.style.display == "") checque2.style.display="none";
  }
}

function recalc2(val){
	//val2 = eval("document.forms.orderform.checque.value");
        var val2 = document.getElementById('checque_1').value;
	
	fin = (val - val2);
	if(fin < 0)	fin = "Přeplatek " + (fin*-1);
	if(fin > 0)	fin = "Doplatek " + fin;
	
	document.getElementById('checque_2').value = fin;
	
	
}

function slicker(id)
{
    if (document.getElementById(id).className == 'display')
    {
        document.getElementById(id).className='hidden';
    }
    
    else
    {
        document.getElementById(id).className='display';
    }
}