function popup()
{
	var popup = document.getElementById('popup');
	if (popup) {popup.style.display = 'block';};
	//if (popup) {popup.onclick = function() {this.style.display = 'none';};};
}

function close_popup()
{
	var popup = document.getElementById('popup');
	document.getElementById('popup').style.display = 'none';
}

window.onload = popup;