jQuery plug-in Validate implements custom form validation_jquery

This article explains the jQuery Validate form verification plug-in in an example, how to customize a verification method, and shares it with everyone for your reference. The specific content is as follows

The effect is as follows:

Verification failure effect:

Verification success effect:

Specific steps:

1. Introduce dependency packages

 <script src="../../scripts/jquery-1.3.1.js" type="text/javascript"></script>
 <script src="lib/jquery.validate.js" type="text/javascript"></script>

2. Add error style and success style

 em { font-weight: bold; padding-right: 1em; vertical-align: top; }
em.error {
 background:url("images/unchecked.gif") no-repeat 0px 0px;
 padding-left: 16px;
}
em.success {
 background:url("images/checked.gif") no-repeat 0px 0px;
 padding-left: 16px;
}

3. Customize a verification method

 //自定义一个验证方法
 $.validator.addMethod(
 "formula", //验证方法名称
 function(value, element, param) {//验证规则
  return value == eval(param);
 }, 
 '请正确输入数学公式计算后的结果'//验证提示信息
 );

4. Call style display

 errorElement: "em",    //用来创建错误提示信息标签
  success: function(label) {   //验证成功后的执行的回调函数
   //label指向上面那个错误提示信息标签em
   label.text(" ")    //清空错误提示消息
    .addClass("success"); //加上自定义的success类
  }

5. The detailed code is as follows

 



 <script src="../../scripts/jquery-1.3.1.js" type="text/javascript"></script>
 <script src="lib/jquery.validate.js" type="text/javascript"></script>


 
 


 

 

 

 
jQuery表单验证插件----自定义一个验证方法
 

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The above is the entire content of this article. I hope it will be helpful to everyone in learning form verification.