Hiding the Category Text in a List View with a Group By

I recently had a request of me to hide the 'Category:' text on a List View web part in a MOSS 2007 farm.  As I have now had this request a few times and each time have to go figure out how to do it again, I thought that meant it was time for a quick blog post!  I found the original source here.  It's a great write up, but there are a few enhancements mentioned in the comments that were never incorporated into the script code of the article.  So here is the code with the changes incorporated:

_spBodyOnLoadFunctionNames.push("HideHeaders");

function HideHeaders()
{
	var elements = getElementsByClassName(document, "td", "ms-gb");
	var elem;
	for(var i=0;i<elements.length;i++)
	{
		elem = elements[i];
		elem.childNodes[3].style.display = "none";
		elem.childNodes[4].nodeValue = elem.childNodes[4].nodeValue.replace(':', '');   }

		elements = getElementsByClassName(document, "td", "ms-gb2");

		for(var i=0;i<elements.length;i++)
		{
			elem = elements[i];
			elem.childNodes[3].style.display = "none";
			elem.removeChild(elem.childNodes[4]);
		}

		elements = getElementsByClassName(document, "tr", "ms-viewheadertr");

		for(var i=0;i<elements.length;i++)
		{
			elem = elements[i];
			elem.style.display = "none";
		}
	}

	/*
	Written by Jonathan Snook, http://www.snook.ca/jonathan
	Add-ons by Robert Nyman, http://www.robertnyman.com
	*/

	function getElementsByClassName(oElm, strTagName, strClassName)
	{
		var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
		var arrReturnElements = new Array();
		strClassName = strClassName.replace(/-/g, "\-");
		var oRegExp = new RegExp("(^|\s)" + strClassName + "(\s|$)");
		var oElement;
		for(var i=0; i<arrElements.length; i++)
		{
			oElement = arrElements[i];
			if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}