//<![CDATA[
function validate() {

if (trim(document.Enquiry.name.value) <= ' ') {
	alert("Please enter your name.");
	document.Enquiry.name.focus();
	return false;
}

if (!emailCheck(document.Enquiry.email.value)) {
	document.Enquiry.email.focus();
	return false;
}

if (trim(document.Enquiry.phone.value) <= ' ') {
	alert("Please enter a contact telephone number.");
	document.Enquiry.phone.focus();
	return false;
}

if (trim(document.Enquiry.company.value) <= ' ') {
	alert("Please enter your Organisation's name.");
	document.Enquiry.company.focus();
	return false;
}

cat = "";

if (cat > 0 || document.Enquiry.brochure.checked) {
	if (trim(document.Enquiry.address.value) <= ' ') {
		alert("Please enter your address to receive a free full-colour catalogue.");
		document.Enquiry.address.focus();
		return false;
	}
}

if (trim(document.Enquiry.comments.value) <= ' ') {
	alert("Please enter your enquiry details.");
	document.Enquiry.comments.focus();
	return false;
}

return true;
}

function ltrim (s) {
	return s.replace( /^\s*/, "" );
}

function rtrim (s) {
	return s.replace( /\s*$/, "" );
}

function trim (s) {
	return rtrim(ltrim(s));
}

function emailCheck (emailStr) {

var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

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]

// 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
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The domain name doesn't seem to be valid.")
    return false
}

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

/* Now we need to break up the domain to get a count of how many atoms
   ime preceding
   the domain or country. */

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 ||
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="This address is missing a hostname!"
   alert(errStr)
   return false
}

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

document.onmousedown=function(e){
	if (!self.gfPop) return;
	var n=!e?self.event.srcElement.name:e.target.name;
	if (document.layers) {
		with (gfPop) var l=pageX, t=pageY, r=l+clip.width, b=t+clip.height;
		if (n!="popcal"&&(e.pageX>r||e.pageX<l||e.pageY>b||e.pageY<t)) gfPop.fHideCal();
		return routeEvent(e);	// must use return here.
	} else if (n!="popcal") gfPop.fHideCal();
}
if (document.layers) document.captureEvents(Event.MOUSEDOWN);
//]]>