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Q: How to reset onload event handler that was set to null?

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Is it possible to set the onload event handler of an image object back to 
its default once it has been set to null?

For example, in the beginning of a function, which was triggered by the 
onload event, the onload event handler is set to null so that various image 
replacements within the function body will not retrigger the function.

The onload event handler of the object is however needed again at a 
different time for some other function. Eg.:

function bla(){
document.getElementById('bla').onload=null;

// some img replacement stuff that should not retrigger another onload event
document.getElementById('bla').src='another.jpg';

document.getElementById('bla').onload ...
// how to recreate the onload event handler after?

}

<img id='bla' src=some.jpg" onload="bla();">

Can the event handler be recreated after it's been set to null? 

Many thanks,
Tuxedo

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Q: How to reset onload event handler that was set to null? Tuxedo <tuxedo@mailinator.com> - 2013-05-22 22:36 +0200
  Re: Q: How to reset onload event handler that was set to null? Tuxedo <tuxedo@mailinator.com> - 2013-05-22 23:32 +0200
    Re: Q: How to reset onload event handler that was set to null? Tuxedo <tuxedo@mailinator.com> - 2013-05-23 00:12 +0200
  Re: Q: How to reset onload event handler that was set to null? JJ <duh@nah.meh> - 2013-05-23 08:47 +0700
  Re: Q: How to reset onload event handler that was set to null? Christian Winter <thepoet_nospam@arcor.de> - 2013-05-23 07:48 +0200
    Re: Q: How to reset onload event handler that was set to null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-23 10:19 +0200
      Re: Q: How to reset onload event handler that was set to null? Christian Winter <thepoet_nospam@arcor.de> - 2013-05-23 18:06 +0200
        Re: Q: How to reset onload event handler that was set to null? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-23 18:31 +0200
  Re: Q: How to reset onload event handler that was set to null? sake mera <sakemera@gmail.com> - 2013-05-23 14:02 -0700

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