// JavaScript Document
function isEmail(argvalue) {

  if (argvalue.indexOf(" ") != -1)
    return false;
  else if (argvalue.indexOf("@") == -1)
    return false;
  else if (argvalue.indexOf("@") == 0)
    return false;
  else if (argvalue.indexOf("@") == (argvalue.length-1))
    return false;

  // arrayString = argvalue.split("@"); (works only in netscape3 and above.)
  var retSize = customSplit(argvalue, "@", "arrayString");

  if (arrayString[1].indexOf(".") == -1)
    return false;
  else if (arrayString[1].indexOf(".") == 0)
    return false;
  else if (arrayString[1].charAt(arrayString[1].length-1) == ".") {
    return false;
  }

  return true;

}


function makeArray(IntarrSize) {

  for (var n = 0; n < IntarrSize; n++)
    this[n] = "";

  return this;

}


function customSplit(strvalue, separator, arrayName) {
  var n = 0;

  if (separator.length != 0) {
    while (strvalue.indexOf(separator) != -1) {
      eval("arr"+n+" = strvalue.substring(0, strvalue.indexOf(separator));");
      strvalue = strvalue.substring(strvalue.indexOf(separator)+separator.length,
          strvalue.length+1);
      n++;
    }
    eval("arr" + n + " = strvalue;");
    arraySize = n+1;
  }
  else {
    for (var x = 0; x < strvalue.length; x++) {
      eval("arr"+n+" = \"" + strvalue.substring(x, x+1) + "\";");
      n++;
    }
    arraySize = n;
  }

  eval(arrayName + " = new makeArray(arraySize);");

  for (var i = 0; i < arraySize; i++)
    eval(arrayName + "[" + i + "] = arr" + i + ";");

  return arraySize;
}


function checkFrm(response){
	var x = document.formulier;
	var error = 0;
	
	if(x.naam.value==""){
		error=1;
		document.getElementById('lblNaam').innerHTML = '<font color="red">*</font>';
	} else {
		document.getElementById('lblNaam').innerHTML = '*';	
	}
	
	if(!isEmail(x.mail.value)){
		error=1;
		document.getElementById('lblMail').innerHTML = '<font color="red">*</font>';
	} else {
		document.getElementById('lblMail').innerHTML = '*';	
	}
	
	if(x.tel.value==""){
		error=1;
		document.getElementById('lblTel').innerHTML = '<font color="red">*</font>';
	} else {
		document.getElementById('lblTel').innerHTML = '*';	
	}
	
	if(x.adres.value==""){
		error=1;
		document.getElementById('lblAdres').innerHTML = '<font color="red">*</font>';
	} else {
		document.getElementById('lblAdres').innerHTML = '*';	
	}
	
	if(error==0)
		x.submit();
	
	
}