function toggleVocabularyList(vocID)
{
	var listObj = document.getElementById('vocabList'+vocID);
	var imgObj  = document.getElementById('vocabToggle'+vocID);
	state       = listObj.style.display;
	
	if (state == 'none') {
		listObj.style.display = 'block';
		imgObj.src = '/common/minus.gif';
	} else if (state == 'block') {
		listObj.style.display = 'none';
		imgObj.src = '/common/plus.gif';
	}
	
}