M∞niΦ barvy pozadφ

V hlaviΦce dokumentu:
< SCRIPT>
function initArray() // inicializace pole 
{
  this.length = initArray.arguments.length
  for (var i = 0; i < this.length; i++)
   this[i+1] = initArray.arguments[i]
}
var hexChars = "0123456789ABCDEF";
function Dec2Hex (Dec) // p°evod do ÜestnßctkovΘ soustavy 
{
  var a = Dec % 16;
  var b = (Dec - a)/16;
  hex = "" + hexChars.charAt(b) + hexChars.charAt(a);
  return hex;
}
function bgChanger (begin, end, steps) // m∞niΦ pozadφ 
{
  steps = steps -1 ;

  redA     = begin.charAt(0) + begin.charAt(1);
  red_valA = parseInt(redA,'16');
  redB     = end.charAt(0) + end.charAt(1);
  red_valB = parseInt(redB,'16');
  red_int  = ((red_valB - red_valA) / steps) * -1;
  grnA     = begin.charAt(2) + begin.charAt(3);
  grn_valA = parseInt(grnA,'16');
  grnB     = end.charAt(2) + end.charAt(3);
  grn_valB = parseInt(grnB,'16');
  grn_int  = ((grn_valB - grn_valA) / steps) * -1;
  bluA     = begin.charAt(4) + begin.charAt(5);
  blu_valA = parseInt(bluA,'16');
  bluB     = end.charAt(4) + end.charAt(5);
  blu_valB = parseInt(bluB,'16');
  blu_int  = ((blu_valB - blu_valA) / steps) * -1;

  step = 2;
  red = red_valA;
  grn = grn_valA;
  blu = blu_valA;

  document.bgColor = begin;

  while ( steps >= step ) 
  {
    red -= red_int;
    red_round = Math.round(red);
    red_hex = Dec2Hex(red);

    grn -= grn_int;
    grn_round = Math.round(grn);
    grn_hex = Dec2Hex(grn);

    blu -= blu_int;
    blu_round = Math.round(blu);
    blu_hex = Dec2Hex(blu);

    document.bgColor = red_hex + grn_hex + blu_hex;

    step++;
  }
  document.bgColor = end;
}
< /SCRIPT>

Vyvolßnφ m∞niΦe z t∞la dokumentu:

< SCRIPT>
 bgChanger("hex-k≤d ·vodnφ barvy",
 "hex-k≤d koneΦnΘ barvy",velikost kroku);
< /SCRIPT>

Vyvolßnφ m∞niΦe z t∞la dokumentu - p°φklad:
< SCRIPT>
 bgChanger("000000","FFFFFF",25); 
 // zm∞na z ΦernΘ barvy na bφlou
< /SCRIPT>