Calling JavaScript from a Button

Calling JavaScript from a button is a great way to confirm a request. Oracle Application Express uses this technique for the delete operation of most objects. For example, when you delete a button, a JavaScript message appears asking you to confirm your request. Consider the following example:

<script type="text/javascript">
  function deleteConfirm(msg)
  {
var confDel = msg;
if(confDel ==null)
  confDel= confirm("Would you like to perform this delete action?");
else
  confDel= confirm(msg);
  
if (confDel== true)
  doSubmit('Delete');
  }
</script>

This example creates a function to confirm a delete action and then calls that function from a button. Note that the function optionally submits the page and sets the value of the internal variable :REQUEST to Delete, thus performing the deletion using a process that conditionally executes based on the value of the request.

Note that when you create the button, you would need to select Action Redirect to URL without submitting page. Then, you would specify a URL target such as the following:

confirmDelete('Would you like to perform this delete action?');