Disabling buttons after click

AlexW · November 10th, 2011, 04:32 PM

I'm guessing Javascript is the best way to do this because I need to disable a button to stop multiple post backs. I have added the following function:

Code:

<script type="text/javascript">
    function disablebutton() {
        document.getElementById("LoginButton").disabled = true;
    }
</script>

and added to my ASP button:

OnClientClick="disablebutton()"

Problem is I get the following error:
Microsoft JScript runtime error: Unable to set value of the property 'disabled': object is null or undefined

Can anyone help?

AlexW · November 10th, 2011, 05:10 PM

I used the following which seems to work ok:

OnClientClick="this.disabled = true" UseSubmitBehavior="false"

joefawcett · November 10th, 2011, 05:26 PM

Check the actual id of the button, it's probably not what you think.
If you are using asp 4 you can set it precisely.