one page and two <script type="text/javascript" src="/js/jquery-1.4.2.min.js"></script>
<p>sorry for bad english. 
i have the page (index.html) with a line </p>

<pre><code> &lt;script type="text/javascript" src="/js/jquery-1.4.2.min.js"&gt;&lt;/script&gt;.
</code></pre>

<p>this page loads ajax page (page2.html). this ajax page include 
 <code>&lt;script type="text/javascript" src="/js/jquery-1.4.2.min.js"&gt;&lt;/script&gt;</code> itself.
when page2.html load in main page (index.html) there is no problem with page2.html performance but another function with jquery in index.html got error like this "object dosent support this property" although it worked before page2.html load.
it seems that there are conflict between two jquery. if i remove <code>&lt;script type="text/javascript" src="/js/jquery-1.4.2.min.js"&gt;&lt;/script&gt;</code> from page2.html it work fine because index.html include this line but page2.html will not work independently. i tried $.noConflict(); and it doesnt work.</p>
