var msg="Welcome to the International Office Of South-Central University For Nationalities!";
    var interval = 100;
    var maxlen = 120;
    var space=" ";
    var seq=0;
    var stext="";
    var len;
    
    for (i=1; i<=maxlen; i++) 
      stext += space;
    stext += msg;//实现文字起始逐个出现在最左边。

    function InitScroll() 
    { 
      len = msg.length;
      window.status = msg.substring(0, seq+1);
      seq++;//这两句实现在递归时文字逐个出现在最左边。
      if(seq >= len)//若已经全部出现，则开始进入跑马灯效果 
      { 
        seq = maxlen; 
        window.setTimeout("Scroll();", interval );
      }
      else
        window.setTimeout("InitScroll();", interval);//否则继续递归。
    }

    function Scroll() 
    { 
      len=stext.length;
      window.status=stext.substring(seq, len);
      seq++;
      if(seq >= len) 
      {
        seq = 0;
      }
      window.setTimeout("Scroll();", interval);
    } 

    InitScroll();