gistfile1.txt

До
var beforeChilde = beforeNode.firstChild, //перший син beforeNode
    afterChilde = afterNode;                //елемент рівний afterNode
  while(beforeChilde){
    if(beforeChilde.tagName!==undefined){
      if(beforeChilde.style.color==="green"){
        for(var i=0; i<afterNode.childElementCount;i++){
          afterChilde=afterNode.children[i];//елемент син afterNode  
          if(afterChilde.style.color==="green"){
            if(afterChilde.tagName===beforeChilde.tagName){
              if(beforeChilde.childElementCount>0 && afterChilde.childElementCount>0){
                //перевірка на неоднаковість innerHTML
                if(afterChilde.innerHTML!==beforeChilde.innerHTML){
                  objThird.beforeElement[objThird.beforeElement.length]=beforeChilde;
                  objThird.afterElement[objThird.afterElement.length]=afterChilde;
                  objThird.html[objThird.html.length]=afterChilde.innerHTML;
                  beforeChilde.style.color="orange";
                  afterChilde.style.color="orange";
                  change(beforeChilde,afterChilde);
                  break;
                }
              }
            }
          }
        }
      }
    }
    beforeChilde=beforeChilde.nextSibling;  
  

gistfile2.txt

  var beforeChilde = beforeNode.firstChild, //перший син beforeNode
    afterChilde = afterNode;                //елемент рівний afterNode
  while(beforeChilde){
    var condition = beforeChilde.tagName!==undefined;
    if(condition) nextCheck(beforeNode, afterNode);
    beforeChilde=beforeChilde.nextSibling;   
  }

  function nextCheck(beforeNode, afterNode){
    var condition = beforeChilde.style.color==="green";
    if(condition) nextCheckLoop(beforeNode, afterNode);
  }
  function nextCheckLoop(beforeNode, afterNode){
    var condition;
    var answer=false;
    for(var i=0; i<afterNode.childElementCount;i++){
      afterChilde=afterNode.children[i];
      condition=beforeChilde.childElementCount>0 && afterChilde.childElementCount>0;
      if(condition) answer=checkLoopTag(beforeNode, afterNode);
      if(answer){answer=false; break;}
    }
  }
  function checkLoopTag(beforeNode, afterNode){
    var condition = afterChilde.innerHTML!==beforeChilde.innerHTML;
    if(condition) return changeTag(beforeNode, afterNode);
    else return false;
  }
  function changeTag(beforeNode, afterNode){
    objThird.beforeElement[objThird.beforeElement.length]=beforeChilde;
    objThird.afterElement[objThird.afterElement.length]=afterChilde;
    objThird.html[objThird.html.length]=afterChilde.innerHTML;
    beforeChilde.style.color="orange";
    afterChilde.style.color="orange";
    change(beforeChilde,afterChilde);
    return true;
  }