Disable [Send] button for a few second after clicking on it to avoid duplication

Disable [Send] button for a few second after clicking on it to avoid duplication

Hello

We are on SDP MSP and sometimes it happens when a technician presses [Send] in Reply form and having no visible feedback presses it again and again, meanwhile the system sends notifications each time 

Would it be possible to fix (prevent) such situation by using a popular approach to disable the button temporary for a few seconds to force a user to be more patient and wait for a feedback?

Even this PITSTOP support site uses such the trick and here when you push [POST] then this button is grayed out (disabled) and I cannot push it very frequently by mistake.

Maybe there is a JavaScript code which could  be easely adopted in SDP MSP?
Anything I can put in /opt/ServiceDeskPlus-MSP/custom/scripts

                  New to ADSelfService Plus?