Did you try that ? I mean – why are you counteracting a functional usable piece of code with your – “why not?”-stuff.
Well then I will tell why not:
First – BECAUSE it DOES NOT work
Second – Im not gonna debug your “Why not”-stuff to find out WHY NOT

For example there is an exception when you click on “new” in an admin generated form:

Unable to find the sfGuardUserPeer object with the following parameters “array ( ‘sf_format’ => ‘html’,)”).

stack trace:
1. at ()
in SF_ROOT_DIR/lib/vendor/symfony/lib/routing/sfObjectRoute.class.php line 111
2. t sfObjectRoute->getObject()
in SF_ROOT_DIR/apps/backend/modules/helper/lib/menu_builder/sfMenuBuilder.class.php line 77

I think the problem is that there is no object in the route at the time this form is generated.

$(document).ready(function() {
$(‘input[type=file]‘).each(function(){
$(this).addClass(‘file’).addClass(‘hidden’);
$(this).parent().append($(”).append($(”).attr(‘id’,$(this).attr(‘id’)+’__fake’)).append($(”)));

$(this).bind(‘change mouseout’, function() {
$(‘#’+$(this).attr(‘id’)+’__fake’).val($(this).val());;
});

});
});