function emailCheck (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 +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert("Email address seems incorrect (check @ and .'s)");
			return false;
		}
		var user=matchArray[1];
		var domain=matchArray[2];
		for (i=0; i<user.length; i++) {
			if (user.charCodeAt(i)>127) {
				alert("Ths username contains invalid characters.");
				return false;
		   }
		}
		for (i=0; i<domain.length; i++) {
			if (domain.charCodeAt(i)>127) {
				alert("Ths domain name contains invalid characters.");
				return false;
		   }
		}
		if (user.match(userPat)==null) {
			alert("The username doesn't seem to be valid.");
			return false;
		}
		var IPArray=domain.match(ipDomainPat);
		if (IPArray!=null) {
			for (var i=1;i<=4;i++) {
				if (IPArray[i]>255) {
					alert("Destination IP address is invalid!");
					return false;
			   }
			}
		}
		var atomPat=new RegExp("^" + atom + "$");
		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;
		   }
		}
		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;
		}
		if (len<2) {
			alert("This address is missing a hostname!");
		return false;
	}
	return true;
}

function HTMLsendCheck(semail,sfirstName,smiddleName,slastName,sgender,sstreet,snumber,szip,scity,scompany){
	if(emailCheck(document.htmlsendFORM.email.value)==false) 				{											return false;	}
	if(sfirstName==1)	{	if(document.htmlsendFORM.firstname.value=='') 	{	alert('Voornaam is verplicht.'); 		return false;	}	}
	if(smiddleName==1)	{	if(document.htmlsendFORM.middlename.value=='') 	{	alert('Tussenvoegsel is verplicht.');	return false;	}	}
	if(slastName==1)	{	if(document.htmlsendFORM.lastname.value=='') 	{	alert('Achternaam is verplicht.');		return false;	}	}
	if(sgender==1)		{	if(document.htmlsendFORM.gender.value=='') 		{	alert('Aanhef is verplicht.');			return false;	}	}
	if(sstreet==1)		{	if(document.htmlsendFORM.street.value=='') 		{	alert('Straatnaam is verplicht.');		return false;	}	}
	if(snumber==1)		{	if(document.htmlsendFORM.number.value=='') 		{	alert('Straatnummer is verplicht.');	return false;	}	}
	if(szip==1)			{	if(document.htmlsendFORM.zip.value=='') 		{	alert('Postcode is verplicht.');		return false;	}	}
	if(scity==1)		{	if(document.htmlsendFORM.city.value=='') 		{	alert('Plaats is verplicht.');			return false;	}	}
	if(scompany==1)		{	if(document.htmlsendFORM.name.value=='') 		{	alert('Bedrijfsnaam is verplicht.');	return false;	}	}
	return 				true;
}

function HTMLsendCheckUk(semail,sfirstName,smiddleName,slastName,sgender,sstreet,snumber,szip,scity,scompany){
	if(emailCheck(document.htmlsendFORM.email.value)==false) 				{											return false;	}
	if(sfirstName==1)	{	if(document.htmlsendFORM.firstname.value=='') 	{	alert('Firstname is obligatory.'); 		return false;	}	}
	if(smiddleName==1)	{	if(document.htmlsendFORM.middlename.value=='') 	{	alert('Middlename is obligatory.');		return false;	}	}
	if(slastName==1)	{	if(document.htmlsendFORM.lastname.value=='') 	{	alert('Lastname is obligatory.');		return false;	}	}
	if(sgender==1)		{	if(document.htmlsendFORM.gender.value=='') 		{	alert('Gender is obligatory.');			return false;	}	}
	if(sstreet==1)		{	if(document.htmlsendFORM.street.value=='') 		{	alert('Street is obligatory.');			return false;	}	}
	if(snumber==1)		{	if(document.htmlsendFORM.number.value=='') 		{	alert('Number is obligatory.');			return false;	}	}
	if(szip==1)			{	if(document.htmlsendFORM.zip.value=='') 		{	alert('Postalcode is obligatory.');		return false;	}	}
	if(scity==1)		{	if(document.htmlsendFORM.city.value=='') 		{	alert('City is obligatory.');			return false;	}	}
	if(scompany==1)		{	if(document.htmlsendFORM.name.value=='') 		{	alert('Company is obligatory.');		return false;	}	}
	return 				true;
}