/* CLIENT-ALTERABLE VARIABLES */
//ST_sample should be the fraction of the whole sample that you want to survey ie a value of 2 would mean half of the visitors
var ST_startDate = new Date(2010,5,13);
var ST_endDate = new Date(2011,4,5);
var ST_sample = 1;
var ST_pageText = 'At the moment we\'re conducting a survey about the use of our site. For this reason a <strong>popup</strong> will be opened shortly.'

/* DON'T CHANGE BELOW THIS LINE */

var ST_cookiesSupported = false;
createCookie('ST_test','supported',1);

if (readCookie('ST_test')) {
	ST_cookiesSupported = true;
	eraseCookie('ST_test');
}

ST_startDate.setMonth(ST_startDate.getMonth() - 1);
ST_endDate.setMonth(ST_endDate.getMonth() - 1);

var ST_arrivalTime = new Date();
var ST_surveyPeriod = parseInt((ST_endDate.getTime() - ST_arrivalTime.getTime())/86400000); // in days
var ST_surveyStarted = (ST_startDate.getTime() < ST_arrivalTime.getTime());

/* Initialisation main script */

var W3CDOM = document.createElement && document.getElementsByTagName;

addEventSimple(window,"load",ST_init);
var ST_newWindow;
var ST_loaded = false;

function ST_init() {
	if (!W3CDOM) return;
	if (!ST_cookiesSupported) return;
	var text = document.getElementById('sitetrekText');
	if (text) text.style.display = 'none';
	if (!ST_surveyStarted) return;
	if (ST_surveyPeriod < 0 ) return;
	var currentStatus = readCookie('ST_status');
	if (currentStatus == 'no') return;
	ST_loaded = true;
	addEventSimple(window,"unload",ST_exit); 
	eraseCookie('ST_temp_store');
	if (currentStatus == 'yes') return;
	//var ST_selectedForSurvey = (Math.random()*ST_sample < 1)
	var ST_selectedForSurvey = (Math.floor(Math.random()*ST_sample+1) == 1)
	if (!ST_selectedForSurvey) {
		createCookie('ST_status','no',1);
		return;
	}
	if (text) {
		text.innerHTML = ST_pageText;
		text.style.display = 'block';
	}
	createCookie('ST_status','yes',ST_surveyPeriod);
	addEventSimple(document,"click",ST_openPopup);
	createCookie('ST_referrer',top.document.referrer,1);
}

function ST_openPopup() {
	if (readCookie('ST_popup')) return;
	ST_newWindow = window.open('/popup.html','ST_window','width=300,height=375,resizable=yes,scrollbars=yes');
	//ST_newWindow.blur();
	removeEventSimple(document,"click",ST_openPopup);
}

function ST_exit() {
	ST_loaded = false;
	if (readCookie('ST_popup') == 'opened' && ST_newWindow)
		ST_newWindow.trackMain(location.href);
	else
		createCookie('ST_temp_store',location.href,1);
}

function removeCookie() {
	eraseCookie('ST_status'); 
	location.reload();
}

/********************

      UTILITIES
      
********************/

function addEventSimple(obj,evt,fn) {
	if (obj.addEventListener)
		obj.addEventListener(evt,fn,false);
	else if (obj.attachEvent)
		obj.attachEvent('on'+evt,fn);
}

function removeEventSimple(obj,evt,fn) {
	if (obj.removeEventListener)
		obj.removeEventListener(evt,fn,false);
	else if (obj.detachEvent)
		obj.detachEvent('on'+evt,fn);
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

window.onload=function(){if(!document.getElementById||!document.createTextNode){return;}var nojsmsgprint=document.getElementById('nojsprint');var nojsmsgfav=document.getElementById('nojsfav');if(!nojsmsgprint){return;}var newtxt='Print this page';var newa=document.createElement('a');newa.href='javascript:printpage()';newa.appendChild(document.createTextNode(newtxt));nojsmsgprint.parentNode.replaceChild(newa,nojsmsgprint);newtxt='Add to favorites';newa=document.createElement('a');newa.href='javascript:AddToBookmarks(\"Invest in Southampton\", self.location.href)';newa.appendChild(document.createTextNode(newtxt));nojsmsgfav.parentNode.replaceChild(newa,nojsmsgfav);var searchField=document.getElementById("searchbox");if(searchField.addEventListener){searchField.addEventListener('focus',clearInput,false);searchField.addEventListener('blur',restoreInput,false);}else if(searchField.attachEvent){searchField.attachEvent('onfocus',clearInput);searchField.attachEvent('onblur',restoreInput);}};function clearInput(el){var targ=(el.target)?el.target:el.srcElement;if(targ.defaultValue==targ.value){targ.value="";}}function restoreInput(el){var targ=(el.target)?el.target:el.srcElement;if(targ.value==""){targ.value=targ.defaultValue;}}function AddToBookmarks(title,url){if(document.getElementById){if(document.all){window.external.AddFavorite(url,title);}else if(window.sidebar){window.sidebar.addPanel(title,url,'');}}else{window.location='/tools/favourites.asp';}}function printpage(){if(document.getElementById){window.print();}else{window.location='/tools/print.asp';}}