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 than default time limit, the script can provide a form (for example) allowing the user to enter a larger default time limit. Making this available as a preference setting allows users to indicate their requirements in advance. If warning the user a time limit is about to expire (see SCR16: Providing a script that warns the user a time limit is about to expire (Scripting) ), this form can be made available from the warning dialog.



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  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