var interval = 5000; var itemNum = -1; var random_display = 0; var textArray = scrollcontent; var totalItems = textArray.length-1; 

function randNum(x, y) { var range = y - x + 1; return Math.floor(Math.random() * range) + x; }
function getNextItem() { if (random_display) { itemNum = randNum(0, totalItems-1); } else { if(itemNum == totalItems) { itemNum=-1; } itemNum = itemNum+1; } return itemNum; }
function switchItem(place) { var new_item = getNextItem(); new Effect.Appear(place); document.getElementById(place).innerHTML = textArray[new_item];new Effect.Fade(place, { delay: 3.5 }); var recur_call = "switchItem('"+place+"')"; timerID = setTimeout(recur_call, interval); }