Issue with DOM code and getAttribute

[BlueGhost]

Hello,
I am having an issue with some DOM code.

The code exists within an object and is called by an ajax callback, but I don't think that is my issue, but I could be wrong, it has happened before

The below code generates the following error on the FireFox Console: "TypeError : reviewDiv is undefined".
Then it still goes ahead and correctly prints "individualReviewDiv" which is generated by

console.log(reviewIndex);

I know the code does not make sense but it is to debug the issue.

Please advise as I am relatively new to web development and am at a stand still. Any help is appreciated.

reviewChildren = mySelf.parentDiv.querySelectorAll(".individualReviewDiv");
			console.log(reviewChildren.length + " reviews");
			for (var i=0; reviewChildren.length; i++) {
				var reviewDiv = reviewChildren[i]; 
				reviewIndex = reviewDiv.getAttribute("class"); //<----error on this line
				console.log(reviewIndex);

			}