Most browsers do not give you access to the status bar and it could be turned off by the user.
Should these lines be in there?
var i = 0;
while (i ++ < 140)
Text = " " + Text;
Unless you are using ** as a leader, you should reset Count to 3 in the Scroll function.
Instead of using 'Start();' to run the script you should use
window.onload=Start; or <body onload="Start()">