今天俺值班！（图片滚动js）

<SCRIPT language=JavaScript>
<!-- Hide
function killErrors()
{
return true;
}
window.onerror = killErrors;
//清除所有的JS错误
//-->
</SCRIPT>
<SCRIPT language=JavaScript>
<!--//
 var x = 0;
 var y = 0;
 var limdex = 1100;
 var dest = 0;
 var distance = 0;
 var step = 0;
 var destination = 0;
 var on = true;

function scrollit(destination) {
 step = 3;
 dest = destination;
 if (x<dest & x < limdex){
  while (x<dest) {
   step += (step / 7);
   x += step;
   parent.frames[0].scroll(x,0);
  } 
                        // top.main.scroll(dest,0);
  if(dest <=limdex) { parent.frames[0].scroll(dest,0); }
  x = dest;
 }
 if (x > dest)  {
  while (x>dest) {
   step += (step / 7);
   if(x >= (0+step)) { x -= step; parent.frames[0].scroll(x,0); }
   else break;
  }
  if(dest >= 0) { parent.frames[0].scroll(dest,0); }
  x = dest;
 }
 if (x<1) { parent.frames[0].scroll(1,0); x=1 }
 if (x>limdex) { parent.frames[0].scroll(limdex,0); x=limdex }
 x = dest;
}

function scrollnow()//滚动的代码设置
 {
                if (on)
{
                if (x < limdex & x >= 0 ) {             
                                parent.frames[0].scroll(x,0);
                           
                        x = x + 1;
                       
                        setTimeout('scrollnow()',8);//
       
                }
                else if (x < 0) {
               
                        x = limdex;
                        scrollnow();
                }
            else {
               
                x=0;
                scrollnow();
                }
                }

}

// *********************************
// 去掉原来的stopscroll()
function stopscroll()// 停止滚动
 {
        if (on)
{
        on = false;
        }
        else {
        on = true;
        scrollnow();
        }
}
function startscroll() //滚动开始
{ on = true; scrollnow(); }
function stop_start()//控制滚动的开关
 {
 if (on){ on = false;}
else { on = true;scrollnow();}
}
scrollnow();
//-->

</SCRIPT>