var webSiteWidth = 750;
var curNav = null;
var delay = 250;
var timer = 0;

function showSub( subName, xOffset, yOffset ){
//alert('showSub : ' + subName + ' xOffset: ' + xOffset + ' yOffset :' + yOffset);
   var e, windowWidth, webSiteLeft;
	cancelHide();
	hideSubNavigation();
	e = document.getElementById(subName);
	windowWidth = document.all ? document.body.clientWidth : window.innerWidth;
	webSiteLeft = (windowWidth - webSiteWidth)/2;
	if( webSiteLeft < 0 ) webSiteLeft = 0;
        var left = '' + (webSiteLeft + xOffset) + 'px';
	e.style.left = left;
        //e.style.top = yOffset;
	e.style.visibility = 'visible';
	curNav = subName;

        if(document.all)
        {
            var selects = document.getElementsByTagName('select');
            for(i = 0; i < selects.length; i++)
            {
                selects[i].style.visibility = 'hidden';
            }
        }
}

function hideSubNavigation(){
	if( curNav != null ){
		e = document.getElementById(curNav);
		e.style.visibility = 'hidden';
		curNav = null;
	}

        if(document.all)
        {
            var selects = document.getElementsByTagName('select');
            for(i = 0; i < selects.length; i++)
            {
                selects[i].style.visibility = 'visible';
            }
        }

}
function hideSub(){
	timer = setTimeout('hideSubNavigation()', delay);
}
function cancelHide(){
	clearTimeout(timer);
	timer = 0;
}
function navOver(e){
	e.style.backgroundColor = '#221475';
	e.style.color = '#FFFFFF';
	e.style.cursor = 'hand';
}
function navOut(e){
	e.style.backgroundColor = '#FF9000';
	e.style.color = '#FFFFFF';
}

/*
 * Popup function, the function will calculate the center position for the
 * popup with given window name. Default width is 670, height is 450
 *
 * url		- The url that the popup window reference to.
 * winName	- The popup name, if popup name not provide will use as unique popup
 * scrollbars - "yes" or "no" to enable scrollbar of the popup (default "yes")
 * width	- Width of the popup
 * height	- Height of the popup
 */
function popup(url, winName, scrollbars, width, height)
{
	var w = screen.width;
	var h = screen.height;

	var popW = 670;
	var popH = 450;

	if (width != null || width > 1)
		popW = width;

	if (height != null || height > 1)
		popH = height;

	var xPos = (w - popW)/2;
	var yPos = (h - popH)/2;

	var scroll = "yes";
	if (scrollbars == "no" || scrollbars == "NO")
	{
		scroll = "no";
	}

	if (winName == null)
	{
		winName = "";
	}

	newWindow = window.open(url, winName, "scrollbars=" + scroll + ","
				 + 'width=' + popW + ',height='+ popH
				 + ',screenX=' + xPos + ',screenY=' + yPos
				 + ',top=' + yPos + ',left=' + xPos );

	newWindow.focus();

	return;
}

/*
 * Popup function will generate a window name and call function	
 * popup(url, winName, width, height)
 *
 * url		- The url that the popup window reference to.
 * scrollbars - "yes" or "no" to enable scrollbar of the popup (default "no")
 * width	- Width of the popup
 * height	- Height of the popup
 */
function popupUnique(url, scrollbars, width, height)
{
	now = new Date();
//	winName = "popup" + now.getSeconds();
	winName = "";
	return popup(url, winName, scrollbars, width, height)
}

function fixLinks()
{
	if (!document.getElementsByTagName) return null;
	var server = document.location.hostname;
	var anchors = document.getElementsByTagName("a");
	for(var i=0; i < anchors.length; i++)
	{
		var a = anchors[i];
		var href = a.href;
		var id = a.id;
		var title = a.title;
		if ((href.indexOf("#") != -1) && (href.indexOf("header") == -1)) { // jump ref
			var index = href.indexOf("#") + 1;
			href = "javascript:show('" + href.substring(index) + "');";
			a.setAttribute("href",href);
		}
	}
}

function hideDivs(exempt)
{
	if (!document.getElementsByTagName) return null;
	if (!exempt) exempt = "";
	var divs = document.getElementsByTagName("div");
	for(var i=0; i < divs.length; i++)
	{
		var div = divs[i];
		var id = div.id;
		if ((id != "header") && (id != "pop_up") && (id != "colouredBar")&& (id != "glossary") && (id != "close") && (id != exempt))
		{
			div.style.display = "none";
		}
	}
}

function show(what)
{
	if (!document.getElementById) return null;
	showWhat = document.getElementById(what);
	showWhat.style.display = "block";
	hideDivs(what);
}

function mustEnter(element, name)
{
   if(element.value == '')
   {
       alert('You must enter ' + name + '.');
       element.focus();
       return true;
   }
   return false;
}

function mustSelect(selector, name)
{
   if(selector.selectedIndex == 0)
   {
       alert('You must select ' + name + '.');
       selector.focus();
       return true;
   }
   return false;
}

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) { //v4.0
  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 && document.getElementById) x=document.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];}
}


<!-- This script (email validation) and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- V1.1.3: Sandeep V. Tamhankar (stamhankar@hotmail.com) -->
<!-- Original:  Sandeep V. Tamhankar (stamhankar@hotmail.com) -->

function emailCheck (emailStr) {

/* The following variable tells the rest of the function whether or not
to verify that the address ends in a two-letter country or well-known
TLD.  1 means check it, 0 means don't. */

var checkTLD=1;

/* The following is the list of known TLDs that an e-mail address must end with. */

var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

/* The following pattern is used to check if the entered e-mail address
fits the user@domain format.  It also is used to separate the username
from the domain. */

var emailPat=/^(.+)@(.+)$/;

/* The following string represents the pattern for matching all special
characters.  We don't want to allow special characters in the address. 
These characters include ( ) < > @ , ; : \ " . [ ] */

var specialChars="\\(\\)><@,;:\\\"\\.\\[\\]";

/* The following string represents the range of characters allowed in a 
username or domainname.  It really states which chars aren't allowed.*/

var validChars="\[^\\s" + specialChars + "\]";

/* The following pattern applies if the "user" is a quoted string (in
which case, there are no rules about which characters are allowed
and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
is a legal e-mail address. */

var quotedUser="(\"[^\"]*\")";

/* The following pattern applies for domains that are IP addresses,
rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
e-mail address. NOTE: The square brackets are required. */

var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

/* The following string represents an atom (basically a series of non-special characters.) */

var atom=validChars + '+';

/* The following string represents one word in the typical username.
For example, in john.doe@somewhere.com, john and doe are words.
Basically, a word is either an atom or quoted string. */

var word="(" + atom + "|" + quotedUser + ")";

// The following pattern describes the structure of the user

var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

/* The following pattern describes the structure of a normal symbolic
domain, as opposed to ipDomainPat, shown above. */

var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

/* Finally, let's start trying to figure out if the supplied address is valid. */

/* Begin with the coarse pattern to simply break up user@domain into
different pieces that are easy to analyze. */

var matchArray=emailStr.match(emailPat);

if (matchArray==null) {

/* Too many/few @'s or something; basically, this address doesn't
even fit the general mould of a valid e-mail address. */

alert("Email address seems incorrect (check @ and .'s)");
return false;
}
var user=matchArray[1];
var domain=matchArray[2];

// Start by checking that only basic ASCII characters are in the strings (0-127).

for (i=0; i<user.length; i++) {
if (user.charCodeAt(i)>127) {
alert("Ths username contains invalid characters.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
alert("Ths domain name contains invalid characters.");
return false;
   }
}

// See if "user" is valid 

if (user.match(userPat)==null) {

// user is not valid

alert("The username doesn't seem to be valid.");
return false;
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
host name) make sure the IP address is valid. */

var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {

// this is an IP address

for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
alert("Destination IP address is invalid!");
return false;
   }
}
return true;
}

// Domain is symbolic name.  Check if it's valid.
 
var atomPat=new RegExp("^" + atom + "$");
var domArr=domain.split(".");
var len=domArr.length;
for (i=0;i<len;i++) {
if (domArr[i].search(atomPat)==-1) {
alert("The domain name does not seem to be valid.");
return false;
   }
}

/* domain name seems valid, but now make sure that it ends in a
known top-level domain (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */

if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
alert("The address must end in a well-known domain or two letter " + "country.");
return false;
}

// Make sure there's a host name preceding the domain.

if (len<2) {
alert("This address is missing a hostname!");
return false;
}

// If we've gotten this far, everything's valid!
return true;
}