function send() {
if (emailCheck(document.forms[0].mail.value)==true && document.forms[0].naam.value!="" && document.forms[0].ond.value!="" && document.forms[0].tekst.value!=""){
document.forms.contact.submit();
} else {
document.getElementById("err").style.display="";
}}

function send2() {
if (emailCheck(document.forms[0].mail.value)==true && document.forms[0].naam.value!="" && document.forms[0].voorwaarden.checked==true && document.forms[0].tel.value!="" && document.forms[0].plaats.value!="" && document.forms[0].pcode.value!="" && document.forms[0].adres.value!="" && document.forms[0].domein.value!=""){
document.forms.contact.submit();
} else {
document.getElementById("err").style.display="";
}}

function emailCheck (emailStr) {
var checkTLD=0;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) {return false;}
var user=matchArray[1];var domain=matchArray[2];

for (i=0; i<user.length; i++) {if (user.charCodeAt(i)>127) {return false;}}
for (i=0; i<domain.length; i++) {if (domain.charCodeAt(i)>127) {return false;   }}
if (user.match(userPat)==null) {return false;}
var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {for (var i=1;i<=4;i++) {if (IPArray[i]>255) {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) {return false;   }}
if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {return false;}
if (len<2) {return false;}

return true;
}