var progressEnd = 10;		// set to number of progress <span>'s.
var progressColor = 'red';	// set to progress bar color
var progressInterval = 500;	// set to time between updates (milli-seconds)
 
var progressAt = progressEnd;
var progressTimer;
function progress_clear() {
	for (var i = 1; i <= progressEnd; i++) document.getElementById('progress'+i).style.backgroundColor = 'transparent';
	progressAt = 0;
}
function progress_update() {
	document.getElementById('showbar').style.visibility = 'visible';
	progressAt++;
	if (progressAt > progressEnd) progress_clear();
	else document.getElementById('progress'+progressAt).style.backgroundColor = progressColor;
	progressTimer = setTimeout('progress_update()',progressInterval);
}