Disable Button after once Click by Javascript

Disable Button after clicking on it.If when you set disabled="disabled" immediately after

the user clicks the button, and the form doesn't submit because before form submission button is already diasabled..

Uses- It prevents double form submission..

 you could try these things

1st Way...

//JAVASCRIPT

<script type="text/javascript">
function disable() {
            var v = confirm('Are you sure to save');
            if (v == true) {
                setTimeout(function () { document.getElementById('<%= btnSave.ClientID %>').disabled = true }, 1);
                return true;
            }
            return false;
        }
 
        function preventBack() { window.history.forward(); }
        setTimeout(function () { preventBack() }, 0);
        window.onunload = function () { null };
</script>

//HTML

<input type="button" id="btnsave" runat="server" value="Save" onclick="javascript:disable()" />

2nd Way

myInputButton.disabled = "disabled";
myForm.submit()

Whether it be due to a users lack of tech know-how or a twitch of the finger, a secondary click of a forms ‘Submit’ button could result in the form being submitted twice. Depending on the action of the form this could in turn send two enquiries, create two orders or insert a record into the database twice.

3rd Way

<input type="submit" name="Submit" value="Submit" onclick="this.disabled=true; this.value='Please Wait...';" />