var pages = 0;
var currentpage = 1;
function displaySign()
{
	document.getElementById('signbody').style.display = (document.getElementById('signbody').style.display == 'block') ? 'none' : 'block';
}
function formValidation(form)
{
	if (notEmpty(form.name) && notEmpty(form.onderwerp) && notEmpty(form.message)) return true;
	return false;
}
function notEmpty(elem)
{
	if(elem.value.length == 0)
	{
		alert(requiredError);
		return false;
	}
	return true;
}

function setPages(count)
{
	pages = count;
	displayPage(currentpage);
}
function displayPreviousPage()
{
	if (currentpage > 1) displayPage((currentpage - 1));
}
function displayNextPage()
{
	if (currentpage < pages) displayPage((currentpage + 1));
}
function displayPage(page)
{
	for (i = 1; i <= pages; i++)
	{
		document.getElementById('page'+i).style.display = 'none';
		document.getElementById('link'+i).style.textDecoration = 'none';
	}
	currentpage = page;
	document.getElementById('page'+page).style.display = 'block';
	document.getElementById('link'+page).style.textDecoration = 'underline';
}
function placeSmiley(string)
{
	elem = document.getElementById('message');
	if (elem.value != '') elem.value += ' ';
	elem.value += string;
	elem.focus();
	elem.scrollTop = elem.scrollHeight;
	document.getElementById('smilies').style.display = 'none';
}