background_colors = new Array("000000","000033","000066","000099","0000cc","0000ff","330000","330033","330066","330099","3300cc","3300ff","660000","660033","660066","660099","6600cc","6600ff","990000","990033","990066","990099","9900cc","9900ff","cc0000","cc0033","cc0066","cc0099","cc00cc","cc00ff","ff0000","ff0033","ff0066","ff0099","ff00cc","ff00ff")
counter1 = 0
number_of_colors = 36

function rotate_colors() {
counter1++
if (counter1 == number_of_colors) 
counter1 = 0

document.bgColor=background_colors[counter1]
setTimeout("rotate_colors()", 600)
}