FF执行javascript问题, javascript执行不完全

最近在学AJAX,因为innerHTML中不能执行<script>所以在网上找到了一个innerhtml.js,使用 set_innerHTML("divid","content") 一样能让innerHTML中的script脚本执行起来

这个set_innerHTML在IE第次都能运行,在FF中用alert()可以,但是document.writeln或document.write 就不完全执行,只有第一次刷新页面时才执行,这是为什么,是不是缓存的问题?但我已经在about:config中设置了 browser.cache.check_doc_frequency为1

烦烦烦啊!

附上innerhtml.js的代码

var global_html_pool = [];
var global_script_pool = [];
var global_script_src_pool = [];
var global_lock_pool = [];
var innerhtml_lock = null;
var document_buffer = "";

function set_innerHTML(obj_id, html, time) {
if (innerhtml_lock == null) {
innerhtml_lock = obj_id;
}
else if (typeof(time) == "undefined") {
global_lock_pool[obj_id + "_html"] = html;
window.setTimeout("set_innerHTML('" + obj_id + "', global_lock_pool['" + obj_id + "_html']);", 10);
return;
}
else if (innerhtml_lock != obj_id) {
global_lock_pool[obj_id + "_html"] = html;
window.setTimeout("set_innerHTML('" + obj_id + "', global_lock_pool['" + obj_id + "_html'], " + time + ");", 10);
return;
}

function get_script_id() {
return "script_" + (new Date()).getTime().toString(36)
+ Math.floor(Math.random() * 100000000).toString(36);
}

document_buffer = "";

document.write = function (str) {
document_buffer += str;
}
document.writeln = function (str) {
document_buffer += str + "\n";
}

global_html_pool = [];

var scripts = [];
html = html.split(/<\/script>/i);
for (var i = 0; i < html.length; i++) {
global_html_pool = html.replace(/<script[\s\S]*$/ig, "");
scripts = {text: '', src: '' };
scripts.text = html.substr(global_html_pool.length);
scripts.src = scripts.text.substr(0, scripts.text.indexOf('>') + 1);
scripts.src = scripts.src.match(/src\s*=\s*(\"([^\"]*)\"|\'([^\']*)\'|([^\s]*)[\s>])/i);
if (scripts.src) {
if (scripts.src[2]) {
scripts.src = scripts.src[2];
}
else if (scripts.src[3]) {
scripts.src = scripts.src[3];
}
else if (scripts.src[4]) {
scripts.src = scripts.src[4];
}
else {
scripts.src = "";
}
scripts.text = "";
}
else {
scripts.src = "";
scripts.text = scripts.text.substr(scripts.text.indexOf('>') + 1);
scripts.text = scripts.text.replace(/^\s*<\!--\s*/g, "");
}
}

var s;
if (typeof(time) == "undefined") {
s = 0;
}
else {
s = time;
}

var script, add_script, remove_script;

for (var i = 0; i < scripts.length; i++) {
var add_html = "document_buffer += global_html_pool[" + i + "];\n";
add_html += "document.getElementById('" + obj_id + "').innerHTML = document_buffer;\n";
script = document.createElement("script");
if (scripts.src) {
script.src = scripts.src;
if (typeof(global_script_src_pool[script.src]) == "undefined") {
global_script_src_pool[script.src] = true;
s += 2000;
}
else {
s += 10;
}
}
else {
script.text = scripts.text;
s += 10;
}
script.defer = true;
script.type = "text/javascript";
script.id = get_script_id();
global_script_pool[script.id] = script;
add_script = add_html;
add_script += "document.getElementsByTagName('head').item(0)";
add_script += ".appendChild(global_script_pool['" + script.id + "']);\n";
window.setTimeout(add_script, s);
remove_script = "document.getElementsByTagName('head').item(0)";
remove_script += ".removeChild(document.getElementById('" + script.id + "'));\n";
remove_script += "delete global_script_pool['" + script.id + "'];\n";
window.setTimeout(remove_script, s + 10000);
}

var end_script = "if (document_buffer.match(/<\\/script>/i)) {\n";
end_script += "set_innerHTML('" + obj_id + "', document_buffer, " + s + ");\n";
end_script += "}\n";
end_script += "else {\n";
end_script += "document.getElementById('" + obj_id + "').innerHTML = document_buffer;\n";
end_script += "innerhtml_lock = null;\n";
end_script += "}";
window.setTimeout(end_script, s);
}