Confirmation before submitting form using jQuery

Use following line of code on your submit button

onclick="if (confirm('some text')) return true; else return false;"

Example

<form id="delete" action="{% url 'item_delete' item.id %}" method="post">{% csrf_token %}
<input class="floatright" type="submit"  onclick="if (confirm('some text')) return true; else return false;" value="Delete" />

   $('#delete').submit(function(event){
     if(!confirm("some text")){
        event.preventDefault();
      }
    });

You are submitting the form and after are checking for confirm, you need to the inverse

JS:

$(function() {
   $("#delete_button").click(function(){
      if (confirm("Click OK to continue?")){
         $('form#delete').submit();
      }
   });
});

HTML:

<form id="delete" action="{% url 'item_delete' item.id %}" method="post">{% csrf_token %}
    <input id="delete_button" class="floatright" type="button" value="Delete" />
</form>