color_text.js

function colorText(str,phase)
{
    if (phase == undefined) phase = 0;
  center = 128;
  width = 127;
  frequency = Math.PI*2/str.length;
  for (var i = 0; i < str.length; ++i)
  {
     red   = Math.sin(frequency*i+2+phase) * width + center;
     green = Math.sin(frequency*i+0+phase) * width + center;
     blue  = Math.sin(frequency*i+4+phase) * width + center;
     document.write( '<font style="color:' + RGB2Color(red,green,blue) + '">' + str.substr(i,1) + '</font>');
  }
}