var iAdNo=0,iMaxAds=3,iTo=6000,aAds=new Array("esposuread.jpg","editwebad.jpg","marketingad.jpg"),itId=window.setTimeout("timedChange()",iTo);
function timedChange(){changeAdImg(1);itId=window.setTimeout("timedChange()",iTo);}
function changeAd(i){window.clearTimeout(itId);changeAdImg(i);itId=window.setTimeout("timedChange()",25000);}
function changeAdImg(i){var img=document.getElementById("productAd");if(img){iAdNo=iAdNo+i;if(iAdNo<0)iAdNo=iMaxAds-1;if(iAdNo>=iMaxAds)iAdNo=0;var iYpos=239*iAdNo;img.style.backgroundPosition="0px "+String(iYpos)+"px";}}

function formValid() {
	var name=document.getElementById("name");
	var company=document.getElementById("company");
	var email=document.getElementById("email");
	var phone=document.getElementById("phone");
	var question=document.getElementById("question");
	var valcode=document.getElementById("valcode");
	if (name.value == "") {alert("Please provide a contact name"); name.focus();return false;}
	if (company.value == "") {alert("Please provide your company name"); company.focus();return false;}
	if (email.value == "" && phone.value == "" ) {alert("Please provide either your email address or phone number so we can contact you"); email.focus();return false;}
	if (!isEmail(email.value)) {email.focus();return false;}
	if (question.value == "") {alert("Please enter the nature of your enquiry in the space provided"); question.focus();return false;}
	if (valcode.value == "") {alert("Don't forget to enter the validation code - it helps us deter spammers"); valcode.focus();return false;}
	return true;
}

function ReloadCa(id) {document.getElementById(id).src='/includes/caimage.asp?' + Date();}

function isEmail(emailStr) {
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	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) {
		alert("Please check your email address in particular the @'s and .'s");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
		alert("Please check your email address, the name before the '@' contains some invalid characters.");
		return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
		alert("Please check your email address, the domain name contains some invalid characters.");
		return false;
	   }
	}
	
	if (user.match(userPat)==null) {
		alert("Please check your email address, the name before the '@' appears to be invalid.");
		return false;
	}
	
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
		if (IPArray[i]>255) {
		alert("Please check your email address, the destination IP address is invalid.");
		return false;
	   }
	}
	return true;
	}
	
	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("Please check your email address, the domain name does not appear to be valid.");
		return false;
	   }
	}
	
	if (checkTLD && domArr[domArr.length-1].length!=2 && 
		domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("Please check your email address, it should end in a well-known domain or two letter country.");
		return false;
	}
	
	if (len<2) {
		alert("Please check your email address, it is missing a hostname.");
		return false;
	}
	
	return true;
}