There are times when our applications might take an extra few seconds to respond to a click event. Some users might get impatient and click on the button more than once. We can easily avoid this type of situation by disabling the submit button during PostBack on the page by using a client side script. See sample below.
Demo 1 - With ValidatorsDemo 2 - Without ValidatorsDemo 3-Image ButtonDemo 4 - Invisible Controls