Netscape 6 supports some DOM capabilities that Internet Explorer does not. One of them is removing attributes from elements that Internet Explorer refuses to. You can see that the background color is still yellow in Internet Explorer 5.5 and lower, but is white in Netscape 6. But this deficiency in Internet Explorer 5.x does not apply to all element type and attribute combinations.
Internet Explorer can remove attributes from other elements, such as the P tag.
The first P element on this tip includes the ad at the top of the page. If the browser is able to remove this attribute, we should see the ad changing position from centered to letf-justified. And indeed, in both Netscape 6 and Internet Explorer 4 and up, you can see that the ad is left-justified.