<!--
/* subscription fn */
function isEmailAddress() {
	var isErr = false;
	var errMsg = '';
	var str = document.frmSubscribe.subscribe_email.value
	if(str == '') {
		isErr = true;
		errMsg = 'Error: the email address is missing. \n \n';
	} else {
		if(str.indexOf(".") > 2 && str.indexOf("@") > 0) {
			isErr = false;
		} else {
			isErr = true;
			errMsg = 'Error: Not a recognised email address. \n \n';
		}
	}
	if(isErr) {
		errMsg += 'Please try again.'; 
		alert(errMsg);
		return false;
	} else {
		return true;
	}
}


sfHover = function() {
	var sfEls = document.getElementById("topnav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}

if (window.attachEvent) window.attachEvent("onload", sfHover);

function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

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 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;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);



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_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 changeTextSize(tag, action) {
if(document.getElementsByTagName) {
	var pNodes = document.getElementsByTagName(tag);
	var max = pNodes.length;
	for(var i = 0;i < max;i++)
	   {
	   var nodeObj = pNodes.item(i)
	   nodeObj.style.fontSize = action;
	   }
	}
}



function popupWindow(URL, popupOptions) {
	window.open(URL, 'NewWindow', popupOptions);

}

// SEARCH ENGINE FUNCTIONS
function trim( as_data )
{
	return as_data.replace( /^\s+/g, '' ).replace( /\s+$/g, '' );
}

function isSearchTermValid( aobj_form )
{
	var lobj_searchTerm		= aobj_form.searchTerm;
	var ls_searchTermValue	= lobj_searchTerm.value;
	
	//Blank
	if ( !/\S/.test( ls_searchTermValue ) )
		{
		alert(	'Nothing to search for:\n' + 
				'Please enter some text to search for, it must be more than 2 characters long.' );
		lobj_searchTerm.focus();
		return false;
		}
	
	//Bad Character
	if ( /[^a-z0-9_\" ]/i.test( ls_searchTermValue ) )
		{
		alert(	'Invalid characters:\n' +
				'Only letters, numbers and underscore "_" can be searched for.' );
		lobj_searchTerm.focus();
		return false;
		}
	
	//Too Short
	if ( trim( ls_searchTermValue ).length < 2 )
		{
		alert(	'Search term is too short:\n' + 
				'Please enter a search term longer than 2 characters.' );
		lobj_searchTerm.focus();
		return false;
		}
	
	return true;
}


// -->