// Image Swapping code for rollovers

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}		  
		  
		  
// A few window launching functions

function MM_openBrWindow(theURL,winName,features) { //v.2.0
var myNewWindow = window.open(theURL,winName,features);
MyNewWindow.focus();
} 

function NewWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? parseInt((screen.width-w)/2) : 0;
TopPosition = (screen.height) ? parseInt((screen.height-h)/2) : 0;
settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',screenX='+TopPosition+',screenY='+LeftPosition+',scrollbars='+scroll;
win = window.open(mypage,myname,settings);
if(win.window.focus){win.window.focus();}
}

function openWin(winName, url, w, h){
var popup;
  if (popup != null && !popup.closed) {
  	popup.close();
  }
  var width = 540;
  var height = 550;
  if (arguments.length > 2) { width = w; }
  if (arguments.length > 3) { height = h; }
  if (arguments.length == 1) { url = ''; }
  var left = (screen.availWidth / 2) - (width / 2);
  var top = (screen.availHeight / 2) - (height / 2);
  popup = window.open(url, winName,'toolbar=0,scrollbars=1,resizeable=0,width=' +
width + ',height=' + height + ',top=' + top + ',left=' + left);
  popup.focus();
}

function showHide (id) {
  // var numArticles will change depending on how many articles are on a particular page.  Needs to be set in each page that will call this function.

  for (i=1;i<=numArticles;i++) {
	document.getElementById("article" + i).style.display = 'none';
  }
  
  document.getElementById("article" + id).style.display = '';
  
}

// EXIT SURVEY functions
var survey = true;

function checkSurveybak()
{
	if (survey)
	{
	NewWindow("http://www.calgon.co.uk/surveys/cl_survey1.html","exitsurvey",540,540,"yes");
	}
}

var TEST_ONLY = false;// set to false to not run this in test mode

/// BEGIN COOKIE CONSTRUCT
function Cookie(document,name,hours,path,domain,secure) {
// any VAR in "this" that does not start with a "$" will
// be written into the cookie (read from also)
this.$doc = document
this.$name = name
if (hours) this.$expiration=new Date((new Date()).getTime()+hours*3600000); else this.$expiration = null
if (path) this.$path = path; else this.$path = null
if (domain) this.$domain = domain; else this.$domain = null
if (secure) this.$secure = true; else this.$secure = false
}

function CookieWrite() {
var cookieval=""
for(var prop in this) {
if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function') || prop == '') continue
if (cookieval != "") cookieval += '&'
cookieval+=prop+":"+escape(this[prop])
}
var cookie=this.$name+"="+cookieval
if (this.$expiration) cookie+='; expires=' + this.$expiration.toGMTString()
if (this.$path) cookie+='; path=' + this.$path
if (this.$domain) cookie+='; domain=' + this.$domain
if (this.$secure) cookie+='; secure'
this.$doc.cookie=cookie
}

function CookieRead() {
var allcookies=this.$doc.cookie
if (allcookies=="") {
return false
}
var start= allcookies.indexOf(this.$name+'=')
if (start== -1) {
return false
}
start += this.$name.length+1
var end=allcookies.indexOf(';',start)
if (end == -1) end=allcookies.length
var cookieval = allcookies.substring(start,end)
var a = cookieval.split('&')
for (var i=0;i<a.length;i++) a[i]=a[i].split(':')
for (var i=0;i<a.length;i++) this[a[i][0]]=unescape(a[i][1])
return true
}

function CookieDelete() {
var cookie = this.$name+'='
if (this.$path) cookie+='; path='+this.$path
if (this.$domain) cookie+='; domain='+this.$domain
cookie+='; expires=Fri, 02-Jan-1970 00:00:00 GMT' // MAKE IT EXPIRE!
this.$doc.cookie=cookie
}

new Cookie()
Cookie.prototype.write = CookieWrite
Cookie.prototype.del = CookieDelete
Cookie.prototype.read = CookieRead
/// END COOKIE CONSTRUCT

	var myCookie = new Cookie(document,"exitsurvey",1); // expire in 1 day.
	if (!myCookie.read() || !myCookie.counter) {
  		myCookie.counter = 1; // first visit!
		myCookie.write(); // store off the cookie!
	}
// if the logic gets this far then the user is on the correct page.
myCookie.counter++;
myCookie.write();

function checkSurvey() {
   /* sURL = location.href;
    sURL = sURL.slice(7,sURL.length);
    chunkStart = sURL.indexOf("/");
    sURL = sURL.slice(0,chunkStart); */
 	 if (myCookie.counter == 3) {
	NewWindow("http://www.calgon.co.uk/surveys/cl_survey1.html","exitsurvey",540,540,"yes");
	}
}
function clearCookie() { myCookie.del(); }

function supressSurvey()
{
	survey = false;
}