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 e-mail adres is ongeldig."); // Dutch translation  		  


    //alert("The e-mail address is invalid."); // English translation


    document.forms[0].email.focus();


    return false;


  }


  else return true;


}


//----------------------------------------------------------------------------





function submitform() {


  sErrors = '';


  for(var i=0; i<document.forms["neosense_form"].length; i++) {


    if(document.forms["neosense_form"].elements[i].name.indexOf("*") != -1 && document.forms["neosense_form"].elements[i].type == "checkbox" && !document.forms["neosense_form"].elements[i].checked) {			


      sErrors = sErrors + '\n- ' + document.forms["neosense_form"].elements[i].name.replace("*", '');


    }


    else if(document.forms["neosense_form"].elements[i].name.indexOf("*") != -1 && document.forms["neosense_form"].elements[i].value == '') {			


      sErrors = sErrors + '\n- ' + document.forms["neosense_form"].elements[i].name.replace("*", '');


    }


    else if(document.forms["neosense_form"].elements[i].name.indexOf("*") != -1 && document.forms["neosense_form"].elements[i].name.replace("*", '') == 'emailaddress') {


      CheckEmailValidation(document.forms["neosense_form"].elements[i].value);


    }


  }


  if(sErrors == '') document.forms["neosense_form"].submit();


  else {


    sErrors = 'De volgende veld(en) zijn verplicht om in te vullen:    \n' + sErrors; // Dutch translation


    //sErrors = 'The following field(s) are required to fill in:    \n' + sErrors; // English translation


    alert(sErrors);


    return false;


  }


}


//----------------------------------------------------------------------------