Finding Text Node

trying to read text from text child, basicaly seeking for equvivalent for this:


var groupArray = secondElement.getElementsByTagName("DIV");
// so looking for text nodes
var groupArray = secondElement.getElementsByTagName("??????");

hmm tryed this, seems DOM doesn't see the text node that itself created


// 1.CREATING & filling
imgElement = document.createElement("IMG");
imgElement.src = arrElementsImages[i];
imgElement.setAttribute("style","float:left");
imgElement.style.styleFloat = "left";

firstElement.appendChild(imgElement);
firstElement.appendChild(document.createTextNode("u00a0" + "a"));


//2.TRANSFERING ALL CHILDS TO secondElement
// case1 --> ONLY IMAGE APPEARS !!??
for (i = 0; i < firstElement.childNodes.length; i++)
{
secondElement.appendChild(firstElement.childNodes[i]);
}

//case2 --> TEXT AND IMAGE APEARS
secondElement.innerHTML = firstElement.innerHTML;