<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Untitled Document</title> </head> <body> <form name="frm1" method="post" onsubmit="loginCheck()"> <p>UserName:<input type="text" name="username"/></p> <p>Password:<input type="password" name="password"/></p> <p> <input type="submit" value="Login"/> <input type="reset" value="Reset"/> </p> </form> <script language="JavaScript" type="text/javascript"> function setCookie(name, value, expires, path, domain, secure) { var curcookie = name + "=" + encodeURI(value) +((expires) ? ";expires=" + expires.toGMTString() : "") +((path) ? ";path=" + path : "") +((domain) ? ";domain=" + domain : "") +((secure) ? ";secure" : ""); document.cookie = curcookie; } function getCookie(name) { if(document.cookie.length > 0) { start = document.cookie.indexOf(name + "="); if( start != -1) { start = start + name.length + 1; end = document.cookie.indexOf(";",start); if( end == -1) { end = document.cookie.length; } } return decodeURI(document.cookie.substring(start,end)); } return ""; } function loginCheck() { var name = document.frm1.username.value; var pass = document.frm1.password.value; if( name == "huzhao" && pass == "123" ) { var login = true; var now = new Date(); now.setDate( now.getDate() + 30); setCookie("login",login,now); window.location.href = "index.html"; } } function userlogin() { var login = getCookie("login"); if ( login != null && login != "" ) { alert("Welcome..."); window.location.href = "index.html"; } } userlogin(); </script> </body> </html>