Form validation_html/css_WEB-ITnose

script implements username and password verification

Form Verify
                                                                                                                                                                                      Get the content entered by the user
var value = obj.value;
/3.Get span
var span = document.getElementById('s1');
span.innerHTML = "";
if (reg.test(value)) {
   span.innerHTML = 'Username cannot be empty' ;
                                                                                                                                                                                                                                                                                                                                                                                                               var checkPwd                                                                                          Password box
var pwd = document.forms[0]['pwd'];
var reg = /^s*$/;
var span = document.getElementById ('s2');
                                                                                                                                                                                                                                                                                                                     span.className = 'error'; >                                                                      return false;                     span.innerHTML = 'Password length cannot be less than 6 characters';
;
                                                                  return false;                                                                                                                                                                                              🎜>var repwd = document.forms[0]['re1'];
                                                                                                                                                     >           var span = document.getElementById('s3');
                  span.innerHTML = ''; 🎜>                                                                                                                                                                                                                                                                     span.innerHTML = 'Two passwords are inconsistent';
                     span.className = 'error'; span.innerHTML = 'ok';
span.className = 'info';
return true;
                                                                                             ) {
                                                                                                                                        //3. Get span username') {
var span = document.getElementById('s1');
span.innerHTML = 'Username is required';
span.className = 'info';
>                                                                                                                                                                                         The password length cannot be less than 6 characters!';
                                                                           className = 'info';
                                                                                                            Provide id value for input document.getElmentById();
//2. Get tbody,tbody.getElementsByTagName('input');
//Document.forms can get all form objects in the document
/ /documeents.Forms [0] [name | ID]
var nameinput = document.forms [0] ['username'];
console.log (nameinput);                return checkName(nameInput) && checkPwd() && checkRepwd();
            }
        
        
    

    
        

用户注册

        

            

                
                    
                    
                    

                
                
                    
                    
                    
                
                
                    
                    
                    

                
                
                    

                
            

用户名
密码
重复密码