Retardar texto onmouseover
<body>
<p>
<MARQUEE onmouseover=this.scrollAmount=1 onmouseout=this.scrollAmount=3 scrollAmount=3>Texto</MARQUEE>
</p>
</body>
<body>
<p>
<MARQUEE onmouseover=this.scrollAmount=1 onmouseout=this.scrollAmount=3 scrollAmount=3>Texto</MARQUEE>
</p>
</body>