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From "Bruno Aranda (JIRA)" <...@myfaces.apache.org>
Subject [jira] Commented: (MYFACES-870) IE6: NPE in JavaScript when using <t:calendarInput>
Date Fri, 02 Dec 2005 17:59:31 GMT
    [ http://issues.apache.org/jira/browse/MYFACES-870?page=comments#action_12359172 ] 

Bruno Aranda commented on MYFACES-870:
--------------------------------------

Well, I removed the loop and tested the component (only in firefox, I am on a linux box) and
it seems to work ok. Could you, or someone else, try it in IE6 and report back? Thanks Roland,

> IE6: NPE in JavaScript when using <t:calendarInput>
> ---------------------------------------------------
>
>          Key: MYFACES-870
>          URL: http://issues.apache.org/jira/browse/MYFACES-870
>      Project: MyFaces
>         Type: Bug
>     Versions: 1.1.1
>  Environment: Windows XP SP2
> IE6
>     Reporter: Roland Huss
>     Assignee: Bruno Aranda
>      Fix For: Nightly

>
> This Javascript error occurs in 
>  do {
>                 aTag = aTag.offsetParent;
>                 leftpos += aTag.offsetLeft;
>                 toppos += aTag.offsetTop;
>         } while(aTag.tagName!="BODY");
> when offsetParent is null. This seems to occur on occasion in IE (e.g. within a div with
absolute positioning). 
> The same problem is described in TAPESTRY-173 and TAPESTRY-222.
> A similar problems occurs at
>  while(objParent.tagName.toUpperCase() != "BODY" ){
>         objLeft  += objParent.offsetLeft;
>         objTop   += objParent.offsetTop;
>         objParent = objParent.offsetParent;
>       }
> Again, offsetParent can be null in IE6. An additional condition in the while loop prevents
this gotcha.
> These problems doesn't occur on firefox 1.0.x
> My temporary solution is to catch the NPE and simply ignore it. 

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