login.js

function check_login()
{
    var username = $('#userid').val();
    var password = $('#password').val();

    var url_login    = 'phpfiles/cek.php';
    var url_admin    = location.protocol+'/';

    $.ajax({
        url     : url_login,
        data    : 'userid='+username+'&password='+password,
        type    : 'POST',
        dataType: 'html',
        success : function(pesan){
            if(pesan=='ok'){
                window.location = url_admin;
            }
            else{
                alert("Login Gagal !!);
	    }
        },
    });
}