js保存用户名与密码

<script>

  window.onload = function(){

    var oForm = document.getElementById('loginForm');

    var oUser = document.getElementById('user');

    var oPswd = document.getElementById('pswd');

    var oRemember = document.getElementById('remember');

    //页面初始化时，如果帐号密码cookie存在则填充

    if(getCookie('user') && getCookie('pswd')){

      oUser.value = getCookie('user');

      oPswd.value = getCookie('pswd');

      oRemember.checked = true;

    }

    //复选框勾选状态发生改变时，如果未勾选则清除cookie

    oRemember.onchange = function(){

      if(!this.checked){

        delCookie('user');

        delCookie('pswd');

      }

    };

    //表单提交事件触发时，如果复选框是勾选状态则保存cookie

    oForm.onsubmit = function(){

      if(remember.checked){

        setCookie('user',oUser.value,7); //保存帐号到cookie，有效期7天

        setCookie('pswd',oPswd.value,7); //保存密码到cookie，有效期7天

      }

    };

  };

  //设置cookie

  function setCookie(name,value,day){

    var date = new Date();

    date.setDate(date.getDate() + day);

    document.cookie = name + '=' + value + ';expires='+ date;

  };

  //获取cookie

  function getCookie(name){

    var reg = RegExp(name+'=([^;]+)');

    var arr = document.cookie.match(reg);

    if(arr){

      return arr[1];

    }else{

      return '';

    }

  };

  //删除cookie

  function delCookie(name){

    setCookie(name,null,-1);

  };

</script>