How do I hide AJAX progress indicator using vB_AJAX_Handler

[RealAdvice]

I currently have asynchronous AJAX writing to the db but can't figure out why I can't get a proper response to set the innerHTML of a uniquely named div to blank. I'm using to create the AJAX object. When I do this, it creates a progress indicator but I can't clear it out once the POST is complete. Any suggestions??

function sample(){
	var queryString = "?variableshere=11111;
	var statusdiv = "uniqueidhere"
	
	AJAX = new vB_AJAX_Handler(true);
    
	AJAX.onreadystatechange(samplecomplete(a,b,c));
    AJAX.send('test.php' + queryString);
}

function samplecomplete(a,b,c)
{	
	fetch_object(statusdiv).innerHTML = "<img src=\"/images/misc/13x13progress.gif\">";
	
	if (AJAX.readyState == 4 && AJAX.status == 200)
	{
		if (AJAX.responseXML)
		{
			document.getElementById(rid).className = gaugeclass;
			fetch_object(statusdiv).innerHTML = "";
		}

		if (is_ie)
		{
			AJAX.abort();
		}
	}
	else
	{
		if(document.getElementById(rid))
		{
			document.getElementById(rid).className = gaugeclass;
		}
	}
}