跑马灯

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 <html>
<head>
<script Language="JavaScript">
var msg="这是一个跑马灯效果的JavaScript文档";
var interval = 100;
var spacelen = 120;
var space10=" ";
var seq=0;
function Scroll() {
 len = msg.length;
 window.status = msg.substring(0, seq+1);
 seq++;
 if ( seq >= len ) { 
  seq = spacelen; 
  Scroll2();
  //window.setTimeout("Scroll2();", interval );
 }
 else
 window.setTimeout("Scroll();", interval );
}
function Scroll2() {
 var out="";
 for (i=1; i<=spacelen/space10.length; i++) out +=  space10;
 out = out + msg;
 len=out.length;
 window.status=out.substring(seq, len);
 seq++;
 if ( seq >= len ) {
  seq = 0;
 };
 window.setTimeout("Scroll2();", interval );

Scroll();
</script>
<body>
</body>
</html>