// JavaScript Document
var ourInterval;
var origColor = "#FFFFFF";
var overColor = "yellow";
var scrollSpeed = 50;
var scrollHeight = 5;

function scrollStart(direction, divID, elementID, speed){
//CHANGE THE BACKGROUND COLOR OF THE TD THE MOUSE IS OVER
document.getElementById(elementID).style.color= overColor;
// REPEATED CALL EITHER scrollUp OR scrollDown
ourInterval = setInterval("scroll"+direction+"('"+divID+"')", speed);
}
function scrollEnd(which){
// OUR MOUSE IS OUT, SO RETURN TD TO ORIGINAL COLOR
document.getElementById(which).style.color = origColor;
// STOP CALLING THE SCROLL FUNCTION
clearInterval(ourInterval);
}

function scrollUp(which){
// SET THE SCROLL TOP
document.getElementById(which).scrollTop = document.getElementById(which).scrollTop - scrollHeight;
}
function scrollDown(which){
// SET THE SCROLL TOP
document.getElementById(which).scrollTop = document.getElementById(which).scrollTop + scrollHeight;
}
function scrollLeft(which){
// SET THE SCROLL TOP
document.getElementById(which).scrollLeft = document.getElementById(which).scrollLeft - scrollHeight;
}
function scrollRight(which){
// SET THE SCROLL TOP
document.getElementById(which).scrollLeft = document.getElementById(which).scrollLeft + scrollHeight;
}