加载jquery的CDN

google:

<scripttype="text/javascript"src="//ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>

<scripttype="text/javascript">window.jQuery || document.write('<script type="text/javascript" src="/js/libs/jquery.min.js">\x3C/script>')</script>

因为google众所周知的原因，推荐国内的SAE

SAE:

<script type="text/javascript" src="//lib.sinaapp.com/js/jquery/1.5.2/jquery.min.js"></script>
<script type="text/javascript">window.jQuery || document.write('<script type="text/javascript" src="/js/libs/jquery.min.js">\x3C/script>')</script>

 

SAE的地址：http://sae.sina.com.cn/?m=devcenter&catId=147