isDOM=document.getElementById
isOpera=isOpera5=window.opera && isDOM
isOpera6=isOpera && window.print
isOpera7=isOpera && document.readyState
isMSIE=document.all && document.all.item && !isOpera
isMSIE5=isDOM && isMSIE
isNetscape4=document.layers
isMozilla=isDOM && navigator.appName=="Netscape"
var timer;
var timer2;

var divWidth = 177;
var scrollWidth = 0;
var scrollSpeed = 10;
var scrollStep = 15;
if(isNetscape4 || isMozilla)
{scrollWidth = 18;}
else
{scrollWidth = 16;}
function myScrollStart(dir)
{
  if(dir == 'up')
  {
    timer=setInterval('myScrollUp()', scrollStep);
  }
  else
  {
    timer=setInterval('myScrollDown()', scrollStep);
  }
  timer2=setInterval('myScrollIn()', 300);
}
function myScrollIn()
{
  speedIncr+=1;
}
function myScrollUp(){document.getElementById('scroll').scrollTop-=scrollSpeed+speedIncr;}
function myScrollDown(){document.getElementById('scroll').scrollTop+=scrollSpeed+speedIncr;}
function myScrollTop(){document.getElementById('scroll').scrollTop=0;}
function myScrollBottom(){document.getElementById('scroll').scrollTop=100000;}
function myScrollClear(){
  speedIncr=0;
  clearInterval(timer);
  clearInterval(timer2);
}