function submitEvent(formValid, eventParams)
{
	var s

	if (formValid) {
		s = ''
		if (document.forms[1].action.indexOf('?') == -1)
			s = '?'
		else
			s= '&'
		document.forms[0].action += s + 'event=' + eventParams
		document.forms[0].submit()
		return true
	}
	return false
}

function checkEmpty(field, title)
{
	if (field.value.length == 0) {
		alert('Field "' + title + '" cannot be empty!')
		field.focus()
		return false
	}
	return true
}

function checkRadioButtons(field)
{
	var i
	
	res = false
	for (i = 0; i < field.length; i++) {
		if (field[i].checked) {
			res = true
			break
		}
	}
	return res
}

function checkEmail(email)
{
	if (!validEmail(email.value))
	{
		alert('Incorrect E-mail address!')
		email.focus()
		email.select()
		return false
	}
	return true
}

function validEmail(email)
{
	re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*\.[a-z]{2,3}$/
	return re.test(email)
}