Скрипт для изменения цвета ссылок

(function() {
    'use strict';
 
  var a, b, i, j, len, self, self1, self2, self3, self4, self5, colors, color, color1, color2, color3, color4, color5, timerID;
  colors=['red', 'deeppink', 'orange', 'yellow', 'lime', 'green', 'teal', 'blue', 'fuchsia', 'purple'];
  j=0;
  a=document.querySelectorAll('a');
  for(i=0; i<a.length; i++) {
    a[i].addEventListener("mouseover", rainbow(i), false);
    a[i].addEventListener("mouseout", restore(i), false);
  }
  function rainbow(i) {
    return function(event) {
      self=this;
      b=this.querySelectorAll('*');
      len=b.length;
      self1=b[len-1];
      self2=b[len-2];
      self3=b[len-3];
      self4=b[len-4];
      self5=b[len-5];
      color=self.style.color;
      if(self1) color1=self1.style.color;
      if(self2) color2=self2.style.color;
      if(self3) color3=self3.style.color;
      if(self4) color4=self4.style.color;
      if(self5) color5=self5.style.color;
        function change() {
          self.style.color=colors[j];
          if(self1) self1.style.color=colors[j];
          if(self2) self2.style.color=colors[j];
          if(self3) self3.style.color=colors[j];
          if(self4) self4.style.color=colors[j];
          if(self5) self5.style.color=colors[j];
          j+=1;
          if(j>9) j=0;
       }
  timerID=setInterval(change, 150);
    };
  }
  function restore(i) {
    return function(event) {
      clearInterval(timerID);
      self.style.color=color;
      if(self1) self1.style.color=color1;
      if(self2) self2.style.color=color2;
      if(self3) self3.style.color=color3;
      if(self4) self4.style.color=color4;
      if(self5) self5.style.color=color5;
    };
  }
})();