Drupal 7: use Form API to make a button that doesn't submit the whole page
102813
Ajax Callback Function in Submit Button Doesnt Work
23650
Reload/refresh page in browser without re-submitting form?
76835
How do i disable a submit button when checkbox is uncheck?
38979
Disabled submit button on form vs allow submit then show errors?
121737
Allow user submitted HTML in PHP
13285
2 submit buttons in a form
111841
How to prevent form from being submitted?
123625
Prevent Multiple Form Submissions (Server side)
53838
Make form button/text field same height in all browsers?
126200
How can I tell which button was clicked in a PHP form submit?
81244
How to skip validation when a specific button is clicked?
14637
Submit form without page reloading
125714
How do I prevent a form from being resized by the user?
117156
Customize newform save button - Save and redirect to another form
85680
Can I use ajax to target multiple form elements from one input?
108139
How to create a node out of a webform submission?
52661
How send a form with Javascript when input name is "submit"?