Extract of conversation below. Should be self-explanatory and applied to all submit buttons in Coppermine.
Quote from: ISANexusDev on September 26, 2014, 12:25:04 AM
in order to avoid several touchs on the OK button by nervous users or users with mobile devices with slow connections not sure if the touched correctly the button or not, would be:
<form method="post" name="post" id="post" onsubmit="if(notDefaultUsername(this, '{DEFAULT_USERNAME}', '{DEFAULT_USERNAME_MESSAGE}')){this.submit.disabled = true;this.submit.style.visibility='hidden';return true;}else{return false;}" action="db_input.php">
[..]
Disabling users to multiple submits of the same comment and at same time giving them an inmediate visual feedback that the button was touched (by hidding it)
Quote from: Αndré on October 07, 2014, 10:47:16 AM
Instead of hiding the button, I'd suggest to replace the button image with the loader animation (images/loader.gif).