<form name="auth-guest" method="get" action="check.php" onsubmit="return validateFormGuest()">
						<input type="hidden" name="method" value="guest">
						<label><span class="label">PIN-код:</span><input type="text" name="pincode" placeholder="###-###-###" size="12"><span class="debug"></span></label>
						<label><input type="checkbox" name="terms" value="agreed">Я принимаю условия предоставления услуги</label>
						<button type="submit">Активировать PIN-код</button>
					</form>

function checkField(fld,mask)
{
	if (fld.nodeName!="INPUT") {return true;}
	var lbl = fld;
	while (1)
	{
		lbl = lbl.nextSibling;
		if (lbl==null) {break;}
		if (lbl.nodeName=="SPAN") {break;}
	}
	if (fld.value==null || fld.value=="" || fld.value.length==0)
	{
		lbl.className = "debug warn";
		lbl.innerText = fld.placeHolder;
	}
	return false;
}
function validateFormGuest()
{
	if (!checkField(document.forms["auth-guest"]["pincode"],"###-###-###")) {return false}
	if (!checkField(document.forms["auth-guest"]["terms"],"")) {return false}
	return true;
}