You really don't want to use the marquee tag. It's been depreciated in some browsers and probably won't work in others. It's not a web standard, and it's really obnoxious.
<MARQUEE MICROSOFT scrolling text marquee
ALIGN=TOP MICROSOFT align text with top of marquee
ALIGN=MIDDLE MICROSOFT align text with middle of marquee
ALIGN=BOTTOM MICROSOFT align text with bottom of marquee
BEHAVIOR=SCROLL MICROSOFT text scroll on and off marquee
BEHAVIOR=SLIDE MICROSOFT text scroll in and stays
BEHAVOIR=ALTERNATE MICROSOFT text moves back and forth
BGCOLOR="#rrggbb" MICROSOFT background colour of marquee (can use colour name)
DIRECTION=RIGHT MICROSOFT scroll from right
DIRECTION=LEFT MICROSOFT scroll from left
HEIGHT="number||percent" MICROSOFT height of marquee
HSPACE="number" MICROSOFT horizontal space between marquee and surrounding text
VSPACE="number" MICROSOFT vertical space between marquee and surrounding text
LOOP="number||INFINITE" MICROSOFT loop marquee number times
SCROLLAMOUNT="number" MICROSOFT speed of marquee
SCROLLDELEY="number" MICROSOFT delay in milliseconds
WIDTH="number||percentage"MICROSOFT width of marquee
...</MARQUEE> MICROSOFT end marquee