问题：

layui.use(['layer', 'form', 'element'], function(){
 var layer = layui.layer
 ,form = layui.form
 ,element = layui.element
  function test(){
  //JS代码
  }
});

调用test()时提示未定义

解决办法：

layui.use(['layer', 'form', 'element'], function(){
 var layer = layui.layer
 ,form = layui.form
 ,element = layui.element
  window.test = function(){
  //JS代码
  }
});