<!--要完成此效果需要两个步骤
第一步：把如下代码加入到<head>区域中-->
<SCRIPT language="JavaScript">
<!--
function scrollit(seed) {
var m1 = "HI：你 好! ";
var m2 = "欢 迎 访 问 网 页 教 学 网";
var m3 = "请 多 提 意 见，谢 谢! ";
var msg=m1+m2+m3;
var out = " ";
var c = 1;
if (seed > 100) {
seed--;
cmd="scrollit("+seed+")";
timerTwo=window.setTimeout(cmd,100);
}
else if (seed <= 100 && seed > 0) {
for (c=0 ; c < seed ; c++) {
out+=" ";
}
out+=msg;
seed--;
window.status=out;
cmd="scrollit("+seed+")";
timerTwo=window.setTimeout(cmd,100);
}
else if (seed <= 0) {
if (-seed < msg.length) {
out+=msg.substring(-seed,msg.length);
seed--;
window.status=out;
cmd="scrollit("+seed+")";
timerTwo=window.setTimeout(cmd,100);
}
else {
window.status=" ";
timerTwo=window.setTimeout("scrollit(100)",75);
}
}
}
//-->
</SCRIPT>
<!--第二步：把“onLoad="scrollit(100)"”加在<body>标记里-->
<body onLoad="scrollit(100)">
