var teststrs="";
var totalnum1=0;
var shownum1=0;
var i=1;
var msg="跑马溜溜的山上有个长辫子的姑娘她的名字叫小芳abcdefghijklmnopq";
var totalnum=42;
var total=10;
var a1=32;
var msg1="";
var seq=0;

var slidestr=new Array();
function Scroll1() {
  var shownum;
  
  suba();
 
  total=8;
  totalnum=totalnum1;

  a1=totalnum-total;

  
  msg="";
  var mm=0;
  if(seq>=a1)
    return;
  
  if(seq>=0 & seq<a1)
    {
       for(mm=(seq+1);mm<=(seq+1+total);mm++)
     {

        msg=msg+slidestr[mm];

     }

    } 
     seq=seq+1; 
     td1.innerHTML= strip1(msg); 
}
function  suba()
{

   if(teststrs=="")
     teststrs=form1.test2.value;
   
  
   var ii=0;
   var j=0;
   var n=0;
   var m=0;
   var totallength=teststrs.length;
   var str1="";
   var str2="";
   
   for(ii=0;ii<totallength;ii++)
   {
      str1=teststrs.substring(ii,ii+1);

      if(str1=="‖")
        {
            
           slidestr[n]=teststrs.substring(m,ii+1);
          
           m=ii+1;
           n=n+1; 
           
           
        }
   }
   
    totalnum1=n-1;

}
function Scroll2()
 {
 
  suba();

 
  total=8;
  totalnum=totalnum1;

  a1=totalnum-total;
  var  nn=0;
 
  if(seq<=0)
     return;
  
  msg="";
  
  if(seq>0 & seq<=(a1+1))
  {
    
    
    
    for(nn=(seq-1);nn<=(seq-1+total);nn++)
        msg=msg+slidestr[nn];
   
   
  }
  
   
   td1.innerHTML= strip1(msg);
   seq=seq-1;
   return;
 
}
function strip1(str)
{
  var i=0;
  var n=0;
  var num2=str.length;
  var str1="";
  for(i=0;i<=(num2-1);i++)
  {
    str1=str.substring(i,i+1);
    if(str1=="‖")
    {
      n=i;
    }
  }
  str1=str.substring(n,num2);
  str1=str1.replace("‖"," ");
  
  
  str1=str.substring(0,n)+str1;
  return str1;

}