这语法有问题吗，为什么会错误
SCRIPT5009: '$' is undefined
core.js?73865462146176865042785288646672, line 22 character 194

$.ajaxPrefilter("*",function(s,originalSettings,jqXHR){var dtd=$.Deferred();



SCRIPT5007: Unable to get value of the property 'fn': object is null or undefined
pt_index.js?436b31f6cafb76e736fe9a488b83c7d6, line 2 character 5684

var old=$.fn.tooltip;


多谢指导
[解决办法]
SCRIPT5009: '$' is undefined

jquery的路径不对
[解决办法]
路径不对吧。
alert($);