<SCRIPT LANGUAGE="javascript">
      
    var x = 0;
    var dest = 0;
    var distance = 0;
    var step = 0;
    var destination = 0;
        
    function scrollIt(destination,destURL) {
                step = 1;
                dest = destination;
                if (x<dest) {
                        while (x<dest) {
                                step += (step / 9);
                                x += step;
                                parent.frames.mainframe.scroll(x,0);
                        }
                        parent.frames.mainframe.scroll(dest,0);
                        x = dest;
                }
                
            if (x > dest)
                {
                        while (x>dest) {
                                step += (step / 9);
                    if(x >= (0+step))
                                {
                                        x -= step;
                                        parent.frames.mainframe.scroll(x,0);
                                }
                                else { break;  }
                                }
                        if(dest >= 0) { parent.frames.mainframe.scroll(dest,0); }
                        x = dest;
                }
                        
                if (x<1) {x=1}
                if (x>4500) {x=4500}
                
        
}
        
        
</SCRIPT>

이건 좌 우로 움직이는데요
상하로 움직이게는 어떻게 하나요?