jQuery.validate.js API  Name    Type  validate( options ) Returns: Validator  验证所选的FORM  valid( )    Returns: Boolean  检查是否验证通过  rules( )    Returns: Options  返回元素的验证规则  rules( "add", rules )   Returns: Options  增加验证规则。  rules( "remove", rules )    Returns: Options  删除验证规则  removeAttrs( attributes )   Returns: Options  删除特殊属性并且返回他们  Custom selectors  Name    TypeCustom selectors:           Name    Type  :blank  Returns: Array 
     
        没有值的筛选器  :filled Returns: Array 
      
         有值的筛选器  :unchecked  Returns: Array 
       
          没选择的元素的筛选器  Utilities  Name    TypeString utilities:     Name    Type  jQuery.format( template, argument , argumentN... )  Returns: String  用参数代替模板中的 {n}。     Validator  validate方法返回一个Validator对象, 它有很多方法， 让你能使用引发校验程序或者改变form的内容. validator对象有很多方法, 但下面只是列出常用的.  Name    TypeValidator methods:                       Name    Type  form( ) Returns: Boolean  验证form返回成功还是失败  element( element )  Returns: Boolean  验证单个元素是成功还是失败  resetForm( )    Returns: undefined  把前面验证的FORM恢复到验证前原来的状态  showErrors( errors )    Returns: undefined  显示特定的错误信息  There are a few static methods on the validator object:  Name    TypeValidator functions:     Name    Type  setDefaults( defaults ) Returns: undefined  改变默认的设置  addMethod( name, method, message )  Returns: undefined  添加一个新的验证方法. 必须包括一个独一无二的名字，一个JAVASCRIPT的方法和一个默认的信息  addClassRules( name, rules )    Returns: undefined  增加组合验证类型 在一个类里面用多种验证方法里比较有用  addClassRules( rules )  Returns: undefined  增加组合验证类型 在一个类里面用多种验证方法里比较有用，这个是一下子加多个[edit ]  List of built-in Validation methods  A set of standard validation methods is provided:  Name    TypeMethods:     Name    Type  required( ) Returns: Boolean  必填验证元素  required( dependency-expression )   Returns: Boolean  必填元素依赖于表达式的结果.  required( dependency-callback ) Returns: Boolean  必填元素依赖于回调函数的结果.  remote( url )   Returns: Boolean  请求远程校验。url通常是一个远程调用方法  minlength( length ) Returns: Boolean  设置最小长度  maxlength( length ) Returns: Boolean  设置最大长度  rangelength( range )    Returns: Boolean  设置一个长度范围[min,max]  min( value )    Returns: Boolean  设置最小值.  max( value )    Returns: Boolean  设置最大值.  range( range )  Returns: Boolean  设置值的范围  email( )    Returns: Boolean  验证电子邮箱格式  url( )  Returns: Boolean  验证连接格式  date( ) Returns: Boolean  验证日期格式(类似30/30/2008的格式，不验证日期准确性只验证格式)  dateISO( )  Returns: Boolean  研制ISO类型的日期格式  dateDE( )   Returns: Boolean  验证德式的日期格式（29.04.1994 or 1.1.2006）  number( )   Returns: Boolean  验证十进制数字（包括小数的）  numberDE( ) Returns: Boolean  Makes the element require a decimal number with german format.  digits( )   Returns: Boolean  验证整数  creditcard( )   Returns: Boolean  验证信用卡号  accept( extension ) Returns: Boolean  验证相同后缀名的字符串  equalTo( other )    Returns: Boolean  验证两个输入框的内容是否相同        Name    Type  phoneUS( )  Returns: Boolean  验证美式的电话号码                 validate ()的可选项  debug：进行调试模式  $(".selector").validate  ({     debug: true  })    把调试设置为默认     $.validator.setDefaults({     debug: true  })     submitHandler：用其他方式替代默认的SUBMIT,比如用AJAX的方式提交     $(".selector").validate({     submitHandler: function(form) {      $(form).ajaxSubmit();     }  })     ignore：忽略某些元素不验证  $("#myform").validate({     ignore: ".ignore"  })     rules： 默认下根据form的classes, attributes, metadata判断，但也可以在validate函数里面声明  Key/value 可自定义规则. Key是对象的名字 value是对象的规则，可以组合使用 class/attribute/metadata rules.  以下代码特别验证selector类中name='name'是必填项并且 email是既是必填又要符合email的格式     $(".selector").validate({     rules: {       // simple rule, converted to {required:true}       name: "required",       // compound rule       email: {         required: true,         email: true       }     }  })     messages：更改默认的提示信息     $(".selector").validate({     rules: {       name: "required",       email: {         required: true,         email: true       }     },     messages: {       name: "Please specify your name",       email: {         required: "We need your email address to contact you",         email: "Your email address must be in the format of name@domain.com"       }     }  })  groups：定义一个组，把几个地方的出错信息同意放在一个地方，用error Placement控制把出错信息放在哪里     $("#myform").validate({    groups: {      username: "fname lname"    },    errorPlacement: function(error, element) {       if (element.attr("name") == "fname" || element.attr("name") == "lname" )         error.insertAfter("#lastname");       else         error.insertAfter(element);     },     debug:true   })     nsubmit Boolean Default: true  提交时验证. 设置唯false就用其他方法去验证  Code  不用onsubmit验证,就允许用户无论用什么方法去验证,而是提交时, 用 keyup/blur/click 等方法.  $(".selector").validate({     onsubmit: false  })  onfocusout  Boolean Default: true  Validate elements (except checkboxes/radio buttons) on blur. If nothing is entered, all rules are skipped, except when the field was already marked as invalid.  Code  Disables onblur validation.  $(".selector").validate({     onfocusout: false  })  onkeyup Boolean Default: true  在keyup时验证. As long as the field is not marked as invalid, nothing happens. Otherwise, all rules are checked on each key up event.  Code  Disables onkeyup validation.  $(".selector").validate({     onkeyup: false  })  onclick Boolean Default: true  在checkboxes 和 radio 点击时验证.  Code  Disables onclick validation of checkboxes and radio buttons.  $(".selector").validate({     onclick: false  })  focusInvalid    Boolean Default: true  把焦点聚焦在最后一个动作或者最近的一次出错上via validator.focusInvalid(). The last active element is the one that had focus when the form was submitted, avoiding to steal its focus. If there was no element focused, the first one in the form gets it, unless this option is turned off.  Code  Disables focusing of invalid elements.  $(".selector").validate({     focusInvalid: false  })  focusCleanup    Boolean Default: false  如果是true那么删除出错类从出错的元素上并且隐藏出错信息当这个元素被聚焦 .避免和 focusInvalid.一起用  Code  Enables cleanup when focusing elements, removing the error class and hiding error messages when an element is focused.  $(".selector").validate({     focusCleanup: true  })  meta    String    为了元数据使用其他插件你要包装 你的验证规则 在他们自己的项目中可以用这个特殊的选项  Tell the validation plugin to look inside a validate-property in metadata for validation rules.  $("#myform").validate({     meta: "validate",     submitHandler: function() { alert("Submitted!") }  })          
                
        
         
                    
            
          
        
    
             
         
    
           
        
      errorClass  String  Default: "error"  创建错误类的名字为了去寻找存在的错误标签和增加它到验证失败的元素中去。  Code  Sets the error class to "invalid".  $(".selector").validate({     errorClass: "invalid"  })  errorElement    String  Default: "label"  设置错误的元素，默认的是label你可以改成em.Use this element type to create error messages and to look for existing error messages. The default, "label", has the advantage of creating a meaningful link between error message and invalid field using the for attribute (which is always used, no matter the element type).  Code  Sets the error element to "em".  $(".selector").validate     errorElement: "em"  })  wrapper String    在出错信息外用其他的元素包装一层。Wrap error labels with the specified element. Useful in combination with errorLabelContainer to create a list of error messages.  Code  Wrap each error element with a list item, useful when using an ordered or unordered list as the error container.  $(".selector").validate({     wrapper: "li"  })  errorLabelContainer Selector      把错误信息统一放在一个容器里面。Hide and show this container when validating.  All error labels are displayed inside an unordered list with the ID "messageBox", as specified by the selector passed as errorContainer option. All error elements are wrapped inside an li element, to create a list of messages.  $("#myform").validate({     errorLabelContainer: "#messageBox",     wrapper: "li",     submitHandler: function() { alert("Submitted!") }  })          
                
        
         
                    
          
        
    
        
      
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      errorContainer  Selector      显示或者隐藏验证信息  使用一个额外的容器去显示错误信息  Uses an additonal container for error messages. The elements given as the errorContainer are all shown and hidden when errors occur. But the error labels themselve are added to the element(s) given as errorLabelContainer, here an unordered list. Therefore the error labels are also wrapped into li elements (wrapper option).  $("#myform").validate({     errorContainer: "#messageBox1, #messageBox2",     errorLabelContainer: "#messageBox1 ul",     wrapper: "li", debug:true,     submitHandler: function() { alert("Submitted!") }  })          
                
        
         
            
        
         
        
                
          
        
     
         
   
        
   
        
     
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      showErrors  Callback    Default: None, uses built-in message disply.  得到错误的显示句柄   Gets the map of errors as the first argument and and array of errors as the second, called in the context of the validator object. The arguments contain only those elements currently validated, which can be a single element when doing validation onblur/keyup. You can trigger (in addition to your own messages) the default behaviour by calling this.defaultShowErrors().  Code  Update the number of invalid elements each time an error is displayed. Delegates to the default implementation for the actual error display.  $(".selector").validate({     showErrors: function(errorMap, errorList) {      $("#summary").html("Your form contains " + this.numberOfInvalids() + " errors, see details below.");      this.defaultShowErrors();     }  })  errorPlacement  Callback    Default: 把错误label放在验证的元素后面  可选错误label的放置位置. First argument: The created error label as a jQuery object. Second argument: The invalid element as a jQuery object.  Use a table layout for the form, placing error messags in the next cell after the input.  $("#myform").validate({    errorPlacement: function(error, element) {       error.appendTo( element.parent("td").next("td") );     },     debug:true   })          
            
            
        
         
                    
        
      
         
                    
           
             
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      success String , Callback     成功时的class.If specified, the error label is displayed to show a valid element. If a String is given, its added as a class to the label. If a Function is given, its called with the label (as a jQuery object) as its only argument. That can be used to add a text like "ok!".  添加"valid" 到验证验证元素, 在CSS中定义的样式  $("#myform").validate({      success: "valid",      submitHandler: function() { alert("Submitted!") }  })          
            
            
        
         
            
        
         
        
                  
        
    
             
         
    
           
        
      添加"valid" 到验证验证元素, 在CSS中定义的样式,并加入“ok”的文字  $("#myform").validate({     success: function(label) {       label.addClass("valid").text("Ok!")     },     submitHandler: function() { alert("Submitted!") }  })          
            
            
        
         
            
        
         
        
                  
        
    
             
         
    
           
        
      highlight   Callback    Default: Adds errorClass (see the option) to the Element  高亮显示错误信息。 或者说重写出错时的出错元素的显示。Override to decide which fields and how to highlight.  Code  Highlights an invalid element by fading it out and in again.  $(".selector").validate({    highlight: function(element, errorClass) {       $(element).fadeOut(function() {         $(element).fadeIn()       })    }  })  Code  Adds the error class to both the invalid element and it's label  $(".selector").validate({    highlight: function(element, errorClass) {       $(element).addClass(errorClass);       $(element.form).find("label[for=" + element.id + "]").addClass(errorClass);    },    unhighlight: function(element, errorClass) {       $(element).removeClass(errorClass);       $(element.form).find("label[for=" + element.id + "]").removeClass(errorClass);    }  });  unhighlight Callback    Default: 默认是去掉error类  Called to revert changes made by option highlight, same arguments as highlight.