Color Switcher

This script changes the background color of the <div> below progressively through the Web-safe pallette.
Watch me change color!
The code:

colors    = new Array("000000","000033","000066","000099","0000CC","0000FF",
                      "003300","003333","003366","003399","0033CC","0033FF",
                      "006600","006633","006666","006699","0066CC","0066FF",
                      "009900","009933","009966","009999","0099CC","0099FF",
                      "00CC00","00CC33","00CC66","00CC99","00CCCC","00CCFF",
                      "00FF00","00FF33","00FF66","00FF99","00FFCC","00FFFF",
                      "330000","330033","330066","330099","3300CC","3300FF",
                      "333300","333333","333366","333399","3333CC","3333FF",
                      "336600","336633","336666","336699","3366CC","3366FF",
                      "339900","339933","339966","339999","3399CC","3399FF",
                      "33CC00","33CC33","33CC66","33CC99","33CCCC","33CCFF",
                      "33FF00","33FF33","33FF66","33FF99","33FFCC","33FFFF",
                      "660000","660033","660066","660099","6600CC","6600FF",
                      "663300","663333","663366","663399","6633CC","6633FF",
                      "666600","666633","666666","666699","6666CC","6666FF",
                      "669900","669933","669966","669999","6699CC","6699FF",
                      "66CC00","66CC33","66CC66","66CC99","66CCCC","66CCFF",
                      "66FF00","66FF33","66FF66","66FF99","66FFCC","66FFFF",
                      "990000","990033","990066","990099","9900CC","9900FF",
                      "993300","993333","993366","993399","9933CC","9933FF",
                      "996600","996633","996666","996699","9966CC","9966FF",
                      "999900","999933","999966","999999","9999CC","9999FF",
                      "99CC00","99CC33","99CC66","99CC99","99CCCC","99CCFF",
                      "99FF00","99FF33","99FF66","99FF99","99FFCC","99FFFF",
                      "CC0000","CC0033","CC0066","CC0099","CC00CC","CC00FF",
                      "CC3300","CC3333","CC3366","CC3399","CC33CC","CC33FF",
                      "CC6600","CC6633","CC6666","CC6699","CC66CC","CC66FF",
                      "CC9900","CC9933","CC9966","CC9999","CC99CC","CC99FF",
                      "CCCC00","CCCC33","CCCC66","CCCC99","CCCCCC","CCCCFF",
                      "CCFF00","CCFF33","CCFF66","CCFF99","CCFFCC","CCFFFF",
                      "FF0000","FF0033","FF0066","FF0099","FF00CC","FF00FF",
                      "FF3300","FF3333","FF3366","FF3399","FF33CC","FF33FF",
                      "FF6600","FF6633","FF6666","FF6699","FF66CC","FF66FF",
                      "FF9900","FF9933","FF9966","FF9999","FF99CC","FF99FF",
                      "FFCC00","FFCC33","FFCC66","FFCC99","FFCCCC","FFCCFF",
                      "FFFF00","FFFF33","FFFF66","FFFF99","FFFFCC","FFFFFF");
colorVals = new Array();
colorVals["0"] = 0;
colorVals["3"] = 3;
colorVals["6"] = 6;
colorVals["9"] = 9;
colorVals["C"] = 12;
colorVals["F"] = 15;
var ivl;

function reset()
{
   c   = colors.length - 1;
   dob = document.getElementById("changingDiv");
   dob.style.backgroundColor = "#FFFFFF";
   dob.style.color           = "#000000";
   timer = setTimeout("doColors()",300);
}

function doColors()
{
   clearTimeout(timer);

   // make a color
   bgcol = setBackgroundColor();

   // set background color
   dob.style.backgroundColor = bgcol;

   // set text color based on background color
   setColor(bgcol);

   // if we're not at the end, keep going
   if (c > -1) timer = setTimeout("doColors()",ivl);
}

function setBackgroundColor()
{
   if (c > -1) bgcol = "#" + colors[c];
   c--;
   return bgcol;
}

function setColor(bgcol)
{
   // find average color
   avg = 0;
   for (p=1;p<bgcol.length;p++)
   {
      idx = bgcol.charAt(p);
      avg = avg + colorVals[idx];
   }
   avg = avg / 6;

   // if the background color is dark, turn the text white
   (avg < Math.PI)?dob.style.color="white":dob.style.color="black";
}