难以将变量插入到jquery属性标识中

I'm trying to us jquery to detect if another text box in the same group is checked. The code below is shows how I'm trying to retrieve the group name when the advanced box is checked and use it to see if the accompanying Basic box is checked. The problem is that "basicTrue" is always assigned "undefined", regardless of the condition of the basic checkbox.I'm trying to us jquery to detect if another te