function promptId() {
  status = "Enter the initial letter of your Surname (A-Z)";
}
function promptDat() { 
  status = "Enter your RPA DAT number (RPAxxxxxxx)";
}
function promptVendor() { 
  status = "Enter your Vendor number (yyyyyy)";
}
function promptHolding() { 
  status = "Enter your CPH MainHolding number (aa/bbb/cccc)";
}
function promptIACS() { 
  status = "Enter your IACS reference number (mm-nnnnnn)";
}
function promptEMAIL() { 
  status = "Enter your E-Mail address";
}
function promptEMAILV() { 
  status = "Please enter your E-mail address again for validation";
}
function promptCSP() { 
  status = "Please select the correct Crypographic Service Provider (Microsoft Enhanced Cryptographic Provider v1.0) is recommended";
}
function clearStatus() {
  status = "";
}
function checkDat(requiredDatField) {
  datfmt=/\d{7}$/;
  if (!datfmt.test(rpainput.requiredDatField.value))
  alert('"' + rpainput.requiredDatField.value + '" is incorrectly formatted for a RPA DAT number (0123456). Please remember to enter any leading zeros');
;
}
function checkVen() {
  venfmt=/\d{6}$/;
  if (!venfmt.test(rpainput.requiredVendorField.value))
  alert('"' + rpainput.requiredVendorField.value + '" is incorrectly formatted for a Vendor number (012345). Please remember to enter any leading zeros.');
;
}
function checkMh1() {
  mhfmt=/\d{2}$/;
  if (!mhfmt.test(rpainput.requiredcph1.value))
  alert('"' + rpainput.requiredcph1.value + '" is incorrectly formatted for a Main Holding number. (01/234/5678). Please remember to enter any leading zeros.');
;
}
function checkMh2() {
  mhfmt=/\d{3}$/;
  if (!mhfmt.test(rpainput.requiredcph2.value))
  alert('"' + rpainput.requiredcph2.value + '" is incorrectly formatted for a Main Holding number. (01/234/5678). Please remember to enter any leading zeros.');
;
}
function checkMh3() {
  mhfmt=/\d{4}$/;
  if (!mhfmt.test(rpainput.requiredcph3.value))
  alert('"' + rpainput.requiredcph3.value + '" is incorrectly formatted for a Main Holding number. (01/234/5678). Please remember to enter any leading zeros.');
;
}
function checkIac1() {
  iacfmt=/\d{2}$/;
  if (!iacfmt.test(rpainput.requiredref1.value))
  alert('"' + rpainput.requiredref1.value + '" is not a correctly formatted IACS number. (12-345678)');
;
}
function checkIac2() {
  iacfmt=/\d{6}$/;
  if (!iacfmt.test(rpainput.requiredref2.value))
  alert('"' + rpainput.requiredref2.value + '" is not a correctly formatted IACS number. (12-345678)');
;
}

function checkEmailMatch() {
    if (rpainput.requiredemField.value != rpainput.requiredemvField.value)
    {
        alert('You two input emails don\'t match. Please correct and re-try.');
        return false;
    } else {
        return true;
    }
}

function checkEmailMatchB() {
    if (form.Work_Email.value != form.Confirm_Work_Email.value)
    {
        alert('You two input emails don\'t match. Please correct and re-try.');
        return false;
    } else {
        return true;
    }
}

function checkrequired(which){
	var pass=true
	if (document.images){
		for (i=0;i<which.length;i++){
		var tempobj=which.elements[i]
		if (tempobj.name.substring(0,8)=="required"){
			if (((tempobj.type=="text"||tempobj.type=="textarea")&&tempobj.value=='')||(tempobj.type.toString().charAt(0)=="s"&&tempobj.selectedIndex==-1)){
				pass=false
				break
				}
			}
		}
	}
	if (!pass){
		alert("One or more of the required elements are not completed. Please complete them, then submit again!")
		return false
		}
	else
		return true
}

function DAnoEntry(field) {
    if (field.value.length<1) {
        // alert("Error: A required entry field has been left empty");
        field.focus();
        return false;
    }
    else { return true; }
}

function DAvalidatebilling(field) {
    var valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789 -/:,.&"
    var ok = "yes";
    var temp;
    for (var i=0; i<field.value.length; i++) {
        temp = "" + field.value.substring(i, i+1);
        if (valid.indexOf(temp) == "-1" && temp != '\n' && temp != '\r') ok = "no";
    }
    if (ok == "no") {
        alert("Invalid entry!  Only those characters listed below are accepted!\n\n" + valid + "\n");
        field.focus();
        field.select();
   }
}



<!-- This script 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) -->
<!-- Changes:
/* 1.1.4: Fixed a bug where upper ASCII characters (i.e. accented letters
international characters) were allowed.

1.1.3: Added the restriction to only accept addresses ending in two
letters (interpreted to be a country code) or one of the known
TLDs (com, net, org, edu, int, mil, gov, arpa), including the
new ones (biz, aero, name, coop, info, pro, museum).  One can
easily update the list (if ICANN adds even more TLDs in the
future) by updating the knownDomsPat variable near the
top of the function.  Also, I added a variable at the top
of the function that determines whether or not TLDs should be
checked at all.  This is good if you are using this function
internally (i.e. intranet site) where hostnames don't have to 
conform to W3C standards and thus internal organization e-mail
addresses don't have to either.
Changed some of the logic so that the function will work properly
with Netscape 6.

1.1.2: Fixed a bug where trailing . in e-mail address was passing
(the bug is actually in the weak regexp engine of the browser; I
simplified the regexps to make it work).

1.1.1: Removed restriction that countries must be preceded by a domain,
so abc@host.uk is now legal.  However, there's still the 
restriction that an address must end in a two or three letter
word.

1.1: Rewrote most of the function to conform more closely to RFC 822.

1.0: Original  */
// -->



function DAemailCheck () {
	var DAemailtip = "";
    var emailStr = (rpainput.requiredemField.value);
    DAemailtip = "";
    emailStr = emailStr.toLowerCase();

    /* 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;
}

function DBemailCheck () {
	var DBemailtip = "";
    var emailStr = (form.Work_Email.value);
    DBemailtip = "";
    emailStr = emailStr.toLowerCase();

    /* 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;
}