<body bgcolor="white" onload="dotransition()" >
<script>
messages = new Array()<!--此项可以添加修改文字-->
messages [0]= "２００８年奥运主题。"
mescolor = new Array()<!--此项可以改文字的颜色-->
mescolor[0] = "000000"
messize = new Array()<!--此项可以改文字的大小-->
messize[0] = "
var i_messages = 0
var timer
function dotransition() {
if (document.all) {
content.filters[0].apply()
content.innerHTML = "<span style='color:"+mescolor[i_messages]+";font-size:"+messize[i_messages]+";filter: revealTrans(Transition=12, Duration=3)'>"+messages[i_messages]+"</span>"
content.filters[0].play()
if (i_messages >= messages.length-1) {i_messages = 0}
else {i_messages++}}
if (document.layers) {document.content.document.write("<span style='color:"+mescolor[i_messages]+"'>"+messages[i_messages]+"</span>")
if (i_messages >= messages.length-1) {i_messages = 0}
else {i_messages++}}
timer = setTimeout("dotransition()",3000) }
</script>
请高手帮帮忙解释一下上面程序的具体意思！小弟我看不懂！谢谢！请具体点！
