注册登录校检

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
 
 <html xmlns="http://www.w3.org/1999/xhtml"> 
 
 <head> 
 
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
 
 <title>注册</title> 
 






 <script  language="javascript"> 
 
//javascript check函数,用于检查表单中输入的用户昵称和登录密码是否为空 
 
function check() 
 
{ 
 
 if(document.frm.userName.value=='') 
 
 { 
 
  alert("您的账号不能为空!"); 
 
  document.frm.userName.focus(); 
 
  return false; 
 
 } 
 
 else if(document.frm.userPassword.value=='') 
 
 { 
 
  alert("您的登录密码不能为空"); 
 
  document.frm.userPassword.focus(); 
 
  return false; 
 
 } 
    
 
else if(document.frm.userPassword.value!=document.frm.userPassword1.value) 
 
 { 
 
  alert("对不起,您的两次密码不一致"); 
 
  document.frm.yanzheng.focus(); 
 
  return false; 
 
 } 
 
 else if(document.frm.email.value=='') 
 
 { 
 
  alert("对不起,您的邮箱不能为空"); 
 
  document.frm.yanzheng.focus(); 
 
  return false; 
 
 } 
 
 else if(document.frm.qq.value=='') 
 
 { 
 
  alert("对不起,您的qq不能为空"); 
 
  document.frm.yanzheng.focus(); 
 
  return false; 
 
 } 
 
 else{ 
 
  return true; 
 
  } 
 
} 
 
 
 
</script> 
 








 </script> 
 


 </head> 
 


 <body> 
 


 <h1>注册</h1> 
 




 <div class="banner"> 
 




     
 
    <form  action="#" method="post" name="frm"  οnclick="return check();"> 
 


 <input type="text" value="用户名" maxlength="100" name="userName" >  
 
 <br />    
 
  <input type="password" value="输入密码"  maxlength="100" name="userPassword"  > 
 
  <br />   
 
  <input type="password" value="重复密码"  maxlength="100" 
 
  name="userPassword1"  > 
 
  <br /> 
 
  <input type="text" value="邮箱" maxlength="100" name="email" >  
 
  <br /> 
 
  <input type="text" value="QQ" maxlength="100" name="qq" > 
 
  <br />  
 
   <input type="submit"     value="提交">   
 
     
 
   </form> 
 
 </body> 
 
 </html>

注册登录校检(空值,重复密码校检)_html