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From "Ben Dotte (JIRA)" <tapestry-...@jakarta.apache.org>
Subject [jira] Created: (TAPESTRY-840) Using Submit component as a cancel button causes listener to be called twice in Internet Explorer 6
Date Thu, 19 Jan 2006 18:24:42 GMT
Using Submit component as a cancel button causes listener to be called twice in Internet Explorer
6
---------------------------------------------------------------------------------------------------

         Key: TAPESTRY-840
         URL: http://issues.apache.org/jira/browse/TAPESTRY-840
     Project: Tapestry
        Type: Sub-task
  Components: Framework  
    Versions: 4.0    
 Environment: Tapestry 4.0 final
Internet Explorer 6
    Reporter: Ben Dotte


The recommended way to build a cancel button on a form is to use the Submit component with
javascript like onclick="javascript:this.form.events.cancel();". In Internet Explorer 6, this
causes the cancel listener to get called twice and occasionally the two calls crash into each
other and cause an exception. This problem does not exist with Firefox 1.5. Here is a simple
example that demonstrates the behavior:

<form jwcid="@Form" cancel="listener:cancel">
  <submit jwcid="@Submit" value="Cancel" onclick="javascript:this.form.events.cancel();"/>
</form>

public void cancel(IRequestCycle cycle)
{
  System.out.println("cancel called");
}

Output after clicking the cancel button in IE 6:
cancel called
cancel called
(and sometimes an exception and stack trace)

The workaround is to use the Button component instead with the same javascript call. "cancel
called" is only printed once in that case for Firefox and Internet Explorer and there are
no exceptions.

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