Hi i need a timer on my webpage. Its a free downloadpage where the delivery (after order) takes about 1.5 - 4 minutes. I can get the deliverytime via asking mysql for "don't completet orders". This is not my problem. I dont want a real timer, that askes every xSeconds for the time... I want that this time (for example 00:02:12) is jumping every 10 seconds 5 seconds up or down. Just randomly. How can realize this in JavaScript?