Avoid rewriting style tags

Hi,
ok - but what?

when i past this in:

<div style="background: #000 no-repeat; padding:4px 0 4px 4px; width:215px;color:#FFF;">TESTTEXT</div>

then everythings fine. After inserting an "background-image" it´s breaks again.
So does the Editor maybe has a ruleset where to define this?

greets marek

Hi,
Systemconfig is: OsCommerce / PHP5 / MySQL 5

Javascript (MooTools 1.2):
This Script is used when i change language on the fly (this is just a short description of what it does)
When i click on other language flag, a function is called that does the following:
1. i write back content from CKEDITOR to hidden textarea of active language
2. i write content from from hidden textarea of other language to CKEDITOR

function changeLanguage(options...) {
...
if (CKEDITOR.instances.EDITOR0 != undefined) {
  $('products_description['+actTXTid+']_id').set('value',EDITOR.instances.EDITOR0.getData())
} else {
  $('products_description['+actTXTid+']_id').value = $$('.EDITOR0area').get('value');
}
...
CKEDITOR.instances.HDEDITOR0.setData($('products_description['+active_lang+']_id').get('value'));
...
}

function toggleEDITOR() {    
  if (!CKEDITOR.instances.EDITOR0) {
  CKEDITOR.replace( 'EDITOR0', {
      language: '{/literal}{$shop_language}{literal}'
   });
   return;
} else {
   CKEDITOR.instances.HDEDITOR0.destroy();
}

var HDEDITORstat = "{/literal}{$HTML_AREA_WYSIWYG_DISABLE}{literal}";
  window.addEvent('domready', function(){
    if (EDITORstat == "Enable") {
      toggleHDEDITOR();
    }
});

(i´ve shorten the hole script, ´cause it really long)

The Textarea:
(the editor is loaded into the first textarea - then hidden textareas are generated as often as languages)

<textarea name="EDITOR0" class="EDITOR0area">{$pInfo->arr_products_description.$id}</textarea>
{foreach.....}
 <div class="{$style}" id="lang_div[{$item.id}][4]">
 <textarea name="products_description[{$item.id}]" id="products_description[{$item.id}]_id" style="display:none">{$pInfo->arr_products_description.$id}</textarea>
</div>
{/foreach}

When i disable editor, everythings fine
But the very interesting thing is, when i save the first time, everythings fine - when i make chages and
save then, div with style tag get broken