function set_input_u(eid) {

    document.getElementById('username_u_img').src = "nms/m60211120817/input_u.png";
    document.getElementById("password_u_img").src = "nms/m60211120817/input_u.png";
    var eid = document.getElementById(eid);
    eid.src = "nms/m60211120817/input_u_f.png";
}

function login() {
    var str_user_account = jQuery('#username').val();
    var str_user_password = jQuery('#password').val();
    var js_request_url = '/nms/php_backend/login.php';
    jQuery.ajax(
        {
        url: js_request_url , type : 'POST' , dataType : 'json' , data : { username: str_user_account , password : str_user_password }
        , success : function(Ajs_data) {
        do {
        if (Ajs_data.json_result[0].error_code == 0) {
        window.top.location.href = jQuery('#url_nms_home').attr('href');
        }
        else {
        redir_url = jQuery('#url_login_error').attr('href');
        redir_url += '?error_message=' + encodeURIComponent(Ajs_data.json_result[0].message);
        window.top.location.href = redir_url;
        }
        } while (0);
        }
        , error : function(XMLHttpRequest , textStatus , errorThrown) {
        do {
        console.log(textStatus);
        alert('call php resfull api error');
        } while (0);
        }
        , timeout : 30000
        , cache : false
        }
    );
}

jQuery(document).ready(function($) {
    document.getElementById('username').removeAttribute('readonly');
    document.getElementById('password').removeAttribute('readonly');
    set_input_u('username_u_img');
    document.getElementById('username').focus();
    {
        jQuery('#username').on('keydown', function search(e) {
            if (e.keyCode == 13) {
                jQuery('#password').focus();
            }
        });
    }
    {
        jQuery('#password').on('keydown', function search(e) {
            if (e.keyCode == 13) {
                login();
            }
        });
    }
});