function CheckPictureUpload(progressID) {
	var picture = window.document.postPicture.pictureFile.value.toLowerCase();
	if (JSTrim(picture) == '') {
		// show alert
		window.alert(err_album_js_picture_required);
		// make sure form does not submit
		return false;
		}
	else {
		if (JSRight(picture,4) != '.jpg' && JSRight(picture,5) != '.jpeg' && JSRight(picture,4) != '.gif') {
			// show alert
			window.alert(err_album_js_wrong_format);
			// make sure form does not submit
			return false;
			}
		else {
			// open the progress bar popup
			ShowProgressBar(progressID);
			// submit the form
			return true;
			}
		}
	}