The Four Attribute Margin Reset
layout hacks 1997 partlyTwo attributes for Internet Explorer, two for Netscape, to get a page flush to the edge.
In 2026: Browsers still honour all four, and all four are obsolete. IE used TOPMARGIN and LEFTMARGIN, Netscape used MARGINHEIGHT and MARGINWIDTH, and nobody knew which visitor they had, so everyone shipped all four.
Where it came from: Microsoft and Netscape HTML extensions, both 1996. Neither was ever standard. MDN ↗
<body bgcolor="#000000" text="#00FF00" link="#FFFF00" vlink="#FF00FF" alink="#FF0000"
topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">
<!-- The 2026 version -->
<style>body { margin: 0; background: #000; color: #0f0 }</style>