function clearField(field, text)
{
	if(field.value==text)
	{
		field.style.color = "#000000";
		field.value = "";	
	}
	else if(field.value=="")
	{
		field.style.color = "#AAAAAA";
		field.value = text;	
	}
}

function validate(lang)
{
    var send = true;
    var t = new Array();
    t["en"] = new Array("You need to fill in a valid e-mail address", "You must fill in the code");
    t["nl"] = new Array("U dient een correct e-mailadres in te vullen", "U dient de code in te vullen");
    t["fr"] = new Array("Vous devez entrer une adresse e-mail valide", "Vous devez remplir le code");

	// Controleren op email.
	var email = document.frm.from;
	AtPos = email.value.indexOf("@");
	StopPos = email.value.lastIndexOf(".");
			
	if ((StopPos == -1 || StopPos < AtPos) && send)
	{
		alert(t[lang][0]);
		document.frm.from.focus();
		send = false;
	}
	
	var email = document.frm.to;
	AtPos = email.value.indexOf("@");
	StopPos = email.value.lastIndexOf(".");
			
	if ((StopPos == -1 || StopPos < AtPos) && send)
	{
		alert(t[lang][0]);
		document.frm.to.focus();
		send = false;
	}
	// Einde controle.
	
	if(document.frm.letters.value=="" && send)
	{
		alert(t[lang][1]);
		document.frm.letters.focus();
		send = false;
	}

	if(send)
	{
		document.frm.action = "/custom/send-tell-a-friend.php";
		document.frm.submit();
	}
}