function SwitchImg()
{ //start
  var rem, keep=0, store, obj, switcher=new Array, history=document.Data;
    for (rem=0; rem < (SwitchImg.arguments.length-2); rem+=3) {
    	store = SwitchImg.arguments[(navigator.appName == 'Netscape')?rem:rem+1];
    if ((store.indexOf('document.layers[')==0 && document.layers==null) ||
        (store.indexOf('document.all[')==0 && document.all==null))
         store = 'document'+store.substring(store.lastIndexOf('.'),store.length);
         obj = eval(store);
    if (obj != null) {
   	   switcher[keep++] = obj;
      switcher[keep++] = (history==null || history[keep-1]!=obj)?obj.src:history[keep];
      obj.src = SwitchImg.arguments[rem+2];
  } }
  document.Data = switcher;
} //end

function RestoreImg()
{ //start
  if (document.Data != null)
    for (var rem=0; rem<(document.Data.length-1); rem+=2)
      document.Data[rem].src=document.Data[rem+1];
} //end

function echeck (emailStr)
{var emess=emailCheck(emailStr)
if (emess=="") {return true} else {return false}}

function CheckPresent(v){
if (v.value=="") {return false;} else {return true;}
}

function emailCheck (IemailStr) {

/* 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 msg=""
var checkTLD=1;
var emailStr=IemailStr.toLowerCase();

if (CheckPresent(document.applyform.HomeEmailAddress,"")==false)
{msg="Email address not entered";
return msg}

/* 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. */

msg="Email address seems incorrect (check @ and .'s)";
return msg;
}
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) {
msg="Your email username contains invalid characters.";
return msg;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
msg="Your email domain name contains invalid characters.";
return msg;
   }
}

// See if "user" is valid 

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

// user is not valid

msg="The email username doesn't seem to be valid.";
return msg;
}

/* 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) {
msg="Your email destination IP address is invalid";
return msg;
   }
}
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) {
msg="The email domain name does not seem to be valid.";
return msg;
   }
}

/* 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) {
msg="The email address must end in a well-known domain or two letter country";
return msg;
}

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

if (len<2) {
msg="This email address is missing a hostname!";
return msg;
}

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

//  End -->

function formcheck()
{
var mess="";
if (CheckPresent(document.applyform.Name)==false)
{mess+="\nName not entered"}
else
{if (document.applyform.Name.value.length<6)
{mess+="\nYour name must have at least 6 characters"}
};

if (CheckPresent(document.applyform.Address_1)==false)
{mess+="\nYour address has not been entered"}
else
{if (document.applyform.Address_1.value.length<11)
{mess+="\nYour address must have at least 11 characters"}
};

if (CheckPresent(document.applyform.Postcode)==false)
{mess+="\nYour postcode has not been entered"}
else
{if (document.applyform.Postcode.value.length<7)
{mess+="\nYour postcode must have at least 7 characters"}
};

if (CheckPresent(document.applyform.Phone)==false)
{mess+="\nYour telephone number has not been entered"}
else
{if (document.applyform.Phone.value.length<11)
{mess+="\nYour telephone number must have at least 11 characters"}
};

if (echeck(document.applyform.HomeEmailAddress.value)==false)
{mess+=("\n"+emailCheck(document.applyform.HomeEmailAddress.value))};

if (mess=="")
{
return true}
else
{
alert ("We found some errors!\nPlease correct the details below:\n"+mess);
return false}
}