jQuery validate使用。

step1 导入相应的库

         jquery.js

         jquery-validate.js

step2 填写验证规则

         $('#form').validate({

                   rules:{

                            username:{

                                     required:true,

                                     minlength:5

                            },

                            email:{

                                     required:true,

                                     email:true

                            },

                            comment:"required",

                            valcode:{

                                     formula:"2+3"

                            },

                            phone:"formula2"

                   },

                   messages:{

                            username:{

                                     required:"请输入用户名",

                                     minlength:"请至少输入五个字符"

                            },