Today, form verification is required for projects. So I found this very good jquery Form Verification plug-in on the Internet. Now I will share it with you: Usage: 1. download the zip package from githup. decompress the file 3. import the following file in the js folder in your project: jquery. js, jquery. validationEngine. js, jquery. validationEngine-zh_CN.js (Chinese resource file) [html] <script src = "https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.js" type = "text/javascript"> </script> <script src = "js/jquery. validationEngine_CN.js "type =" text/javascript "charset =" UTF-8 "> </script> <script src =" js/jquery. validationEngine. js "type =" text/javascript "charset =" UTF-8 "> </script> 4. import the css file [html] <link rel = "stylesheet" href = "css/validationEngine.jquery.css" type = "text/css"/> 5 to your project. add verification [html] <input value = "someone@nowhere.com" class = "validate [required]" type = "text" name = "email" id = "email"/> in the form 6. add the initialization js script [html] <script> $ (document ). ready (function () {$ ("# formID "). validationEngine (); // formID is the form id}); </script> 7. run, the effect is as follows: