这个问题有一点跟随：
@H_301_2@
Best way to use Google’s hosted jQuery,but fall back to my hosted library on Google fail
所以我可以检测到JQuery CDN是否关闭并允许这样做：
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
if (typeof jQuery == 'undefined') {
document.write(unescape("%3Cscript src='/Script/jquery-1.7.2.min.js' type='text/javascript'%3E%3C/script%3E"));
}
</script>
如何为jquery.validate加载相同的操作：
<script type="text/javascript" language="javascript" src="http://ajax.microsoft.com/ajax/jQuery.Validate/1.6/jQuery.Validate.min.js"></script>
解决方法
改用：
if(typeof $().validate == 'undefined')
{
/// same code as before except pointing at your local jQuery.validate path
}
DEMO – 检查是否存在验证
如果控制台存在,返回true,否则返回false.@H_301_2@删除DEMO中的脚本引用以获取false作为输出.
您的完整代码可能与此类似：
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="http://ajax.microsoft.com/ajax/jQuery.Validate/1.6/jQuery.Validate.min.js"></script>
<script type="text/javascript">
if (typeof jQuery == 'undefined') {
document.write(unescape("%3Cscript src='/Script/jquery-1.7.2.min.js' type='text/javascript'%3E%3C/script%3E"));
};
if (typeof $().validate == 'undefined') {
document.write(unescape("%3Cscript src='/Script/jquery.Validate-1.6.min.js' type='text/javascript'%3E%3C/script%3E"));
}
</script>
