function CheckEmailValidation(checkString)
	{
	  var newstr = "";
	  var at = false;
	  var dot = false;

	  if (checkString.value == "")
		{
 		  at = true;
		} 
	if (checkString.indexOf("@") != -1)
		{
		  at = true;
		} 
	if (checkString.indexOf(".") != -1)
		{
		  dot = true;
		}

	for (var i = 0; i < checkString.length; i++)
		{
		  ch = checkString.substring(i, i + 1)

		  if ((ch >= "A" && ch <= "Z") || (ch >= "a" && ch <= "z") || (ch == "@") || (ch == ".") || (ch == "_") || (ch == "-") || (ch >= "0" && ch <= "9"))
			{
			  newstr += ch;
		                if (ch == "@")
				{
		              	  at=true;
		             		}
		                if (ch == ".")
				{
		              	  dot=true;
		              	}
			}
		}

	if ((at != true) && (dot != true) || (at == true) && (dot != true) || (at != true) && (dot == true))
		{
		  alert ("Het gegeven e-mail adres is ongeldig.");
		  document.forms[0].email.focus();
		  return false;
		}
	else return true;
}

function submitform() {
	sErrors = '';
	for(var i=0; i<document.forms["neosense_formulier"].length; i++) {
		if(document.forms["neosense_formulier"].elements[i].name.indexOf("*") != -1 && document.forms["neosense_formulier"].elements[i].type == "checkbox" && !document.forms["neosense_formulier"].elements[i].checked) {			
			sErrors = sErrors + '\n- ' + document.forms["neosense_formulier"].elements[i].name.replace("*", '');
		}
		else if(document.forms["neosense_formulier"].elements[i].name.indexOf("*") != -1 && document.forms["neosense_formulier"].elements[i].value == '') {			
			sErrors = sErrors + '\n- ' + document.forms["neosense_formulier"].elements[i].name.replace("*", '');
		}
		else if(document.forms["neosense_formulier"].elements[i].name.indexOf("*") != -1 && document.forms["neosense_formulier"].elements[i].name.replace("*", '') == 'emailadres') {
			CheckEmailValidation(document.forms["neosense_formulier"].elements[i].value);
		}
	}
	if(sErrors == '') document.forms["neosense_formulier"].submit();
	else {
	sErrors = 'De volgende veld(en) zijn verplicht om in te vullen:    \n' + sErrors;
	alert(sErrors);
	return false;
	}
}