It seems to work in Avant. Here's how I set it up.
  1. Right-click this shortcut and select "Add to Favorites..."

    <a href="javascript:(function(){var c=document.all.tags('pre');for(var i=0;i<c.length;i++)with(c(i))void(outerHTML=outerHTML.replace(/\x3CBR\x3E/g, '\n'));try{void(document.styleSheets(0).addRule('PRE','color:darkviolet'))}catch(e){}})()" target="_blank">Fix code tags</a>

    The Add Favorite dialog opens. Click "Create In >>" to expand the dialog to include the subdirectory list. In that list, click "Links" to highlight it, and click OK.
  2. Tools > Avant Browser Options > New Window > [ ] Favorites (uncheck) > OK
  3. View > [x] Links Bar (check)
You can now use the button in the same way you would use it in native IE:



I hope it now works for you.