I figured the issue out.
if (Prototype.BrowserFeatures.XPath) {
document._getElementsByXPath = function(expression, parentElement) {
var results = [];
var query = document.evaluate(expression, $(parentElement) ||
document,
null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
f
files:protopacked_v2.16b.zip ->formatted prototype-1.5.2_pre0.js
I found that the function "getElementsByClassName" in the
compression and formatting code could not use in the Firefox
Today, I download the file 'protopacked_v2.16b.zip', and replace
prototype.js with the compressed code ,