Script error

Hello, I have a problem. Sometimes I can't play the game because there is a script error.
Here he is:
createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')

; s.parentNode.insertBefore(ga, s);
})();

</script>

<script type="text/javascript" charset="utf-8">

$(function(){
$( '[rel^="lightbox"]' ).imageLightbox(
{
quitOnEnd:true,
onStart: function() { overlayOn(); closeButtonOn(); },
onEnd: function() { overlayOff(); activityIndicatorOff(); closeButtonOff();},
onLoadStart: function() { activityIndicatorOn(); },
onLoadEnd: function() { activityIndicatorOff(); }
}); // lightbox

$('[rel="tooltip"]').tooltip(); // tooltip
$('textarea').autosize(); // Autogrow
// $("[rel='switch']").bootstrapSwitch(); // switch
});
$(document).ready(function() {
$('.infinite-container').waypoint('infinite', {
});
});


</script>
<script>

function changeText(){

var $activeText = $(".flying-text-container .active-text");

var $nextText = $activeText.next();
if($activeText.next().length == 0) $nextText = $('.flying-text-container .flying-text:first');

$activeText.animate({opacity:0, marginLeft: "0px"});

$nextText.css({opacity:0}).addClass('active-text').animate({opacity:1, marginLeft: "103px"}, 1600);

$nextText.animate({opacity:1, marginLeft: "103px"}, 6000);

$nextText.animate({opacity:0, marginLeft: "206px"}, 1600, function(){
$activeText.removeClass('active-text');
changeText();
});
}


$(document).ready(function()
{
var refreshId = setInterval(function() {
$("#battlefield_box").load('../inc_ajax/battlefield_report.php');
}, 30000);
});

</script>

Have you tried to play in another browser?