本文实例讲述了js表单登陆验证的方法。分享给大家供大家参考，具体如下：
<!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>项目后台管理系统</title> <link rel="stylesheet" href="__PUBLIC__/css/login.css" /> <script type="text/javascript" src="__PUBLIC__/js/jquery.min.js"></script> <script type="text/javascript"> function $(id) { return document.getElementById(id); } //验证姓名 function checkname(){ var name=$("admin_name").value; if(name=='') { $('s1').innerHTML='姓名不能为空'; $('s1').style.color='red'; return false; } else { $('s1').innerText='ok'; $('s1').style.color='green'; return true; } } //验证密码 function checkpwd(){ var password=$("password").value; if(password=='') { $('s2').innerHTML='密码不能为空'; $('s2').style.color='red'; return false; } else { $('s2').innerHTML='ok'; $('s2').style.color='green'; return true; } } //验证所有表单提交 function checkall() { if(checkname()&&checkpwd()) { return true; } else { return false; } } </script> </head> <body> <div> <form action="__URL__/dologin" method="POST" onsubmit="return checkall();"> <div></div> <div> <div> <input name="admin_name" value="" id="admin_name" onblur="checkname();"/><span id='s1'></span> <input name="password" type="password" value="" id="password" onblur="checkpwd();"/><span id='s2'></span> </div> </div> <div> <input type="submit" value="Login In" /></div> </form> </div> </body> </html>
希望本文所述对大家JavaScript程序设计有所帮助。