How to use the Marquee tag in XHTML code

function getElementsByClass(searchClass,tagName) {
var classElements = new Array();
if ( tagName == null )
tagName = '*';
var els = document.getElementsByTagName(tagName);
var elsLen = els.length;
var pattern = new RegExp("(^|\s)" searchClass "(\s|$)");
for (i = 0, j = 0; i < elsLen; i ) {
if ( pattern.test(els[i].className) ) {
classElements[j] = els[i];
j ;
}
}
return classElements;
}
function ccMarquee(className){
var a=getElementsByClass(className);
for (i = 0; i < a.length; i ) {
a[i].innerHTML="<marquee>" a[i].innerHTML "</marquee>";
}
}window.onload = function () {
ccMarquee("ccMarquee");
}

<div class="ccMarquee">
<a href="" title="">This is scrolling</a>
</div>

<marquee direction=up behavior=scroll loop=3 scrollamount=1 scrolldelay=10 align=top bgcolor=#ffffff height=300 width=30% hspace=20 vspace=10 onmouseover=this.stop() onmouseout=this.start()> Enter scroll content here</marquee>