"error:$ is not defined", please help me.

[aspringer]

I open a grails project in Idea IDE, and I find there is errors about $ character in gsp file when run gsp in IE, the error is :"$ is not defined"
I cannot find the answer, can anyone help me? thanks a lot.

code example in my project:

$(function(){ 100 DWZ.init("/sddw/js/jquery/dwz.frag.xml", { ...}
var js = ${Books};