function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
   {
   checkLogin();
   return false;
   }
else
   return true;
}

function checkLogin()
{
	var form = document.Main;
	var error = "Gebruikersnaam en/of wachtwoord onjuist!";
	var errorcount = 0;
	
	if(form.LoginId.value.length == 0)
	{
		errorcount++;
	}
	
	if(form.LoginId.value == "gebruikersnaam")
	{
		errorcount++;
	}
	
	if(form.Password.value.length == 0)
	{
		errorcount++;
	}

	if(form.Password.value == "wachtwoord")
	{
		errorcount++;
	}
	
	if(errorcount>0)
	{
		alert(error);
		return false;
	}
	else form.submit();
}


function checkForm()
{
	var form = document.contactform;
	var error = "U heeft een aantal verplichte velden niet of niet juist ingevult:\n\n";
	var errorcount = 0;
	
	function isAnEmailAddress(aTextField)
	{
		if (form[aTextField].value.length<5)
		{
			return false;
		}
		else if (form[aTextField].value.indexOf("@") < 1) {
			return false;
		}
		else if (form[aTextField].value.length -
		 form[aTextField].value.indexOf("@") < 4) {
		return false;
		}
		else { return true; }
		}
		function isEmpty(aTextField) {
		if ((form[aTextField].value.length==0) ||
		 (form[aTextField].value==null)) {
		return true;
		}
		else { return false; }
	}
	
	if(form.naam.value.length == 0)
	{
		error = error+"- Naam\n";
		errorcount++;
	}
	
	if(form.emailfrom.value.length == 0 || !isAnEmailAddress("emailfrom"))
	{
		error = error+"- E-Mail\n";
		errorcount++;
	}

	if(form.opmerkingen.value.length == 0)
	{
		error = error+"- Opmerkingen\n";
		errorcount++;
	}

	if(errorcount>0)
	{
		alert(error);
		return false;
	}
	else form.submit();
}