edit.html

<html>
<script>
function isOneChecked() {
  // All <input> tags...
  var chx = document.getElementsByTagName('input');
  for (var i=0; i<chx.length; i++) {
    // If you have more than one radio group, also check the name attribute
    // for the one you want as in && chx[i].name == 'choose'
    // Return true from the function on first match of a checked item
    if (chx[i].type == 'radio' && chx[i].checked) {
      return true;
    } 
  }
  // End of the loop, return false
  alert("At least choose one value")
  return false;
}
  </script>
  <body>
  <h3>Current category: {{ currentCategory|escape }}</h3> 
  <div>
    <form action="/add_item" method="post">
      Add new item: <input type="text" name="item_name">
      <input type="hidden" name="category_name" value="{{ currentCategory|escape }}">
      <br>
      <input type="submit" value="Add">
    </form>
  </div>

  <hr>
  <div>
  <h3>Select one item you want to remove:</h3>
  {% if currentItem %}
  <form action="/remove_item" onsubmit="return isOneChecked()" method="post">
      {% for item in currentItem %}
        <input type="radio" name="remove" value="{{ item.name|escape }}">{{ item.name|escape }}<br>
      {% endfor %}
		<input type="hidden" name="category_name" value="{{ currentCategory|escape }}">
	   <input type="submit" value="Delete">
      </form> 
  {% endif %}  
  </div>
	
  <hr>
  <div>
  <h3>Select one item you want to rename:</h3>
  {% if currentItem %}
  <form action="/rename_item" onsubmit="return isOneChecked()" method="post">
      {% for item in currentItem2 %}
        <input type="radio" name="rename" value="{{ item.name|escape }}">{{ item.name|escape }}<br>
      {% endfor %}
		<input type="hidden" name="category_name" value="{{ currentCategory|escape }}">
		<input type="text" name="new_name">
	   <input type="submit" value="Rename">
      </form> 
  {% endif %}  
  </div>

  <hr>
  <div>
  <h3>Export category:</h3>
  <form action="/export_category" method="post">
	<input type="hidden" name="category_name" value="{{ currentCategory|escape }}">
	<input type="submit" name="export" value="Export">
  </form>
  </div>

<div>
  <a href="/">Back to Main Menu</a>
</div>
  </body>
</html>  