注意：XXX的位置填写版本号~以Jquery为例

<script src="http://ajax.googleapis.com/ajax/libs/jquery/XXX/jquery.min.js"></script>

当前版本号为1.4.2
你引用时就可以写

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>

Jquery

<script src="http://ajax.googleapis.com/ajax/libs/jquery/XXX/jquery.min.js"></script>

jquery UI

<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/XXX/jquery-ui.min.js"></script>

Chrome Frame

<script src="http://ajax.googleapis.com/ajax/libs/chrome-frame/XXX/CFInstall.min.js"></script>

swfobject

<script src="http://ajax.googleapis.com/ajax/libs/swfobject/XXX/swfobject.js"></script>

mootools

<script src="http://ajax.googleapis.com/ajax/libs/mootools/XXX/mootools-yui-compressed.js"></script>

Yahoo! UI

<script src="http://ajax.googleapis.com/ajax/libs/yui/XXX/build/yuiloader/yuiloader-min.js"></script>

Prototype

<script src="http://ajax.googleapis.com/ajax/libs/prototype/XXX/prototype.js"></script>

Ext.JS

<script src="http://ajax.googleapis.com/ajax/libs/ext-core/XXX/ext-core.js"></script>

Dojo

<script src="http://ajax.googleapis.com/ajax/libs/dojo/XXX/dojo/dojo.xd.js"></script>

Scriptaculous

<script src="http://ajax.googleapis.com/ajax/libs/scriptaculous/XXX/scriptaculous.js"></script>