<!--
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_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_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];}
}

function MM_displayStatusMsg(msgStr) { //v1.0
  //status=msgStr;
  status = 'Peak District National Park'; 
  document.MM_returnValue = true;
}


<!--pop up window script, downgrades to simple '_blank' without script enabled, size and features entered below to keep XHTML1.0 compliance

function safePopSetup() {
	var a;
	for (var i = 0; (a = document.links[i]); i++) {
		if (a.target && a.target.indexOf("_glossary") == 0) {
			a.onclick = glosPop;
		}
		if (a.target && a.target.indexOf("_image") == 0) {
			a.onclick = imagePop;
		}
		if (a.target && a.target.indexOf("_pdf") == 0) {
			a.onclick = pdfPop;
		}
		if (a.target && a.target.indexOf("_video") == 0) {
			a.onclick = videoPop;
		}
	}
}

function glosPop() {
	window.open(this.href,'glossary','menubar=yes,scrollbars=yes,resizable=yes,width=420,height=250');
	return false;
	alert("error")
}
function imagePop() {
	window.open(this.href,'image','menubar=no,scrollbars=yes,resizable=yes,width=590,height=420');
	return false;
	alert("error")
}
function pdfPop() {
	window.open(this.href,'image','menubar=yes,scrollbars=yes,resizable=yes,width=600,height=500');
	return false;
	alert("error")
}
function videoPop() {
	window.open(this.href,'image','menubar=yes,scrollbars=yes,resizable=yes,width=350,height=300');
	return false;
	alert("error")
}


//-->

var prevState = "";
function emph(x, cols) {
	var emphCol = "#F5FCEB";
	for (i=1; i<=cols; i++) {
	  document.getElementById(x + i).bgColor = emphCol;
	}
	  i--; //Returns to original value
	  prevState = x + ":" + i; //Set current state to be used by emphOff()
}
function emphOff() {
	var st = prevState.split(':');
	for (i=1; i<=st[1]; i++) {
	  document.getElementById(st[0] + i).bgColor = '';
	}
	
}