Removed the go_to-variable

survey.js

<script type="text/javascript" language="JavaScript">
// page to go to if cookie exists
num_days = 30;

function ged(noDays){
    var today = new Date();
	var expr = new Date(today.getTime() + noDays*24*60*60*1000);
	return expr.toGMTString();
}

function readCookie(cookieName){
	var start = document.cookie.indexOf(cookieName);
	if (start == -1){
		document.cookie = "seenit=yes; expires=" + ged(num_days);
	} else {
		HideContent('survey_holder');
	}
}

readCookie("seenit");

function HideContent(d) {
	if(d.length < 1) { return; }
	document.getElementById(d).style.display = "none";
}
</script>