Highlight scroller in js

var tickercontents=new Array()
tickercontents[0]='Looking for tutorials on PHP, JavaScript, XML, or CSS? Visit Code Tricks!'
tickercontents[1]='Hop on over to Coding Forums to get help on web coding!'
tickercontents[2]='This scroller\'s brought to you by JavaScript Kit- Free scripts and tutorials!'

var tickerwidth="200px"
var tickerheight="70px"
var fontcss="font: bold 14px Verdana; color:black"
var tickdelay=3000 //delay btw messages
var highlightspeed=2 //2 pixels at a time.
var highlightcolor="lightyellow"
var backdroptextcolor="#E1E1E1"

////Do not edit pass this line////////////////

document.write('')
document.write('')

var currentmessage=0
var clipbottom=1

function changetickercontent(){
msgheight=clipbottom=crosstick.offsetHeight
crosstick.style.clip="rect("+msgheight+"px auto auto 0px)"
crosstickbg.innerHTML=tickercontents[currentmessage]
crosstick.innerHTML=tickercontents[currentmessage]
highlightmsg()
}

function highlightmsg(){
//var msgheight=crosstick.offsetHeight
if (clipbottom>0){
clipbottom-=highlightspeed
crosstick.style.clip="rect("+clipbottom+"px auto auto 0px)"
beginclip=setTimeout("highlightmsg()",20)
}
else{
clipbottom=msgheight
clearTimeout(beginclip)
if (currentmessage==tickercontents.length-1) currentmessage=0
else currentmessage++
setTimeout("changetickercontent()",tickdelay)
}
}

function start_ticking(){
crosstickbg=document.getElementById? document.getElementById("highlighterbg") : document.all.highlighterbg
crosstick=document.getElementById? document.getElementById("highlighter") : document.all.highlighter
crosstickParent=crosstick.parentNode? crosstick.parentNode : crosstick.parentElement
if (parseInt(crosstick.offsetHeight)>0)
crosstickParent.style.height=crosstick.offsetHeight+'px'
else
setTimeout("crosstickParent.style.height=crosstick.offsetHeight+'px'",100) //delay for Mozilla's sake
changetickercontent()
}

if (document.all || document.getElementById)
window.onload=start_ticking