function doUpdateTags() {
    $('cloudContainer').innerHTML = '<div class="discrete" style="text-align:center; line-height:30px;"><img src="/resources/s3/indicator.gif"> Loading tags..</div>';
    var params = Form.serialize(document.forms.narrowTags);
    new Ajax.Request('/s3/ajax/tag-cloud', {
            method:'post', 
	    postBody:params, 
	    onComplete: function(originalRequest){
	        if (params==Form.serialize(document.forms.narrowTags))
                    $('cloudContainer').innerHTML = originalRequest.responseText;
	    }
    	});
}
function updateTags() {
    window.setTimeout('if (encodeURI(document.forms.narrowTags.tag.value)=="'+encodeURI(document.forms.narrowTags.tag.value)+'") doUpdateTags()', 500);
}
function resetTags() {
    document.forms.narrowTags.tag.value = '';
    doUpdateTags();
}