JavaScript - how to add support for document.all for other browsers? -

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i have got bunch of old javascript code, document.all used. now, need find way replace document.all document.getelementbyid. there encapsulate document.all, call second function instead? or need edit files?

if (!document.all) {     document.constructor.prototype.__definegetter__('all', function() {          return document.getelementsbytagname('*');      });  }

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