function close_popup(name) {
	popup = document.getElementById(name);
	popup.style.width = '0';
	popup.style.height = '0';
	
	popup.style.visibility = 'hidden';
	popup.style.zIndex = -2;

}

function open_popup(name) {

	popup = document.getElementById(name);
	popup.style.visibility = 'visible';
	popup.style.width = '70%';
	popup.style.height = '60%';
	popup.style.zIndex = 2;
	popup.style.left = '15%';
	popup.style.top = '20%';
	
}