SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<form name="delete" id="delete" method="post" action="index.php?action=delete">
<input type="checkbox" name="delete_all" id="delete_all" value="" />
<input type="checkbox" name="car[]" class="delete_checkbox" value="1" /> First car
<input type="checkbox" name="car[]" class="delete_checkbox" value="2" /> Second car
<input type="checkbox" name="car[]" class="delete_checkbox" value="3" /> Third car
<input type="submit" name="submit_delete" value="Delete" />
</form>

<form name="add" id="add" method="post" action="index.php?action=add">
Car name: <input type="text" name="car_name" value="" />
Car owner: <input type="text" name="car_owner" value="" />
<input type="submit" name="submit_add" value="Add" />
</form>

JavaScript

$('form#delete').submit(function(){
   if(confirm('Are you sure you want to delete?')) { 
     return true; 
   } else { 
     return false;          
   }
});