function encrypt(word) {
        const key = cryptojs.enc.utf8.parse('cnnp.2021#kpdh31');  //十六位十六进制数作为密钥
        const iv = cryptojs.enc.utf8.parse('chuneng#2022wedf');   //十六位十六进制数作为密钥偏移量
        var srcs = cryptojs.enc.utf8.parse(json.stringify(word));
        var encrypted = cryptojs.aes.encrypt(srcs, key, {
            iv: iv,
            mode: cryptojs.mode.cbc,
            padding: cryptojs.pad.pkcs7
        });
        return encrypted.tostring();
    }

    $(function(){
        $('#button').click(function() {
            exclogin();
        });

        document.onkeydown = function(e){
            var ev = window.event || e;
            var code = ev.keycode || ev.which;
            if(code==13){
                exclogin();
            }
        }

        $("input.username").blur(function() {
            var username = $(this).val();
            if(username.length == 0){
                $(".modal-body p.username").css('display', 'block');
            }else{
                $(".modal-body p.username").css('display', 'none');
                $('.alert-danger').css('display','none');
            }

        });

        $("input.pwd").blur(function() {
            var pwd = $(this).val();
            if(pwd.length == 0){
                $(".modal-body p.pwd").css('display', 'block');
            }else{
                $(".modal-body p.pwd").css('display', 'none');
                $('.alert-danger').css('display','none');
            }

        });
    });