How can you stop someone from clicking submit more than once?

Question

On a web page?

Answer 1

Use javascript or use server side programming. In javascript, you can add this little code (document. form1. submit1. disabled = true; <<< be sure to remove spaces) as in the following example:

<form name="form1" onsubmit="document.form1.submit1.disable... = true;">

<input type="submit" name="submit1" value="Submit Form">

</form>

This is the trick Yahoo! answers uses as well (:

Answer 2

Probably best to assume they will click more than once then fix your server side code to deal with it... keep a session id and check it before processing to see if the transaction has already happened.

Answer 3

There is no fool-proof method if the clicker is fast enough...

... otherwise:

Add an onclick event to the submit button that doesn't prevent the form from submitting, but either:

a. HIDEs the button (always fun)

b. DISABLEs the button (using the "disabled=true" option)

c. REPLACEs the button with something else

But whether or not it works (or how fast it responds) depends on the browser and how fast someone clicks.

Answer 4

Duct tape him.

Answer 5

I suggest finding an example, looking in the source code, and copying it.

Answer 6

Use javascript to disable the submit button once clicked.  This will be client-side so it will be instant.