Techniques for WCAG 2.0

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SCR1: Allowing the user to extend the default time limit


Time limits that are controlled by client-side scripting.

This technique relates to:


The objective of this technique is to allow user to extend the default time limit by providing a mechanism to extend the time when scripts provide functionality that has default time limits. In order to allow the user to request a longer time limit, the script can provide a form (for example) allowing the user to enter a larger time limit or indicating that more time is needed. [begin change]If the user is being warned that a time limit is about to expire[end change] (see SCR16: Providing a script that warns the user a time limit is about to expire), this form can be made available from the warning dialog. The user can extend the time limit to at least 10 times the default time limit, either by allowing the user to indicate how much additional time is needed or by repeatedly allowing the user to extend the time limit.



Resources are for information purposes only, no endorsement implied.

  1. setting session and default time limits using Java servlets

  2. Overriding timeouts in peers applications

  3. PHPBuilder Time-out Info



  1. On a Web page that uses scripts to enforce a time limit, wait until the time limit has expired.

  2. Determine if an option was provided to extend the time limit.

Expected Results

If this is a sufficient technique for a success criterion, failing this test procedure does not necessarily mean that the success criterion has not been satisfied in some other way, only that this technique has not been successfully implemented and can not be used to claim conformance.