function displayPopup(number)
{
	var popup_num="popup_"+number;
	document.getElementById(popup_num).style.visibility = "visible";
	document.getElementById(popup_num).style.display = "block";
	//document.getElementById('hide_content').style.visibility = "visible";
	//document.getElementById('hide_content').style.display = "block";
}

function hidePopup(number)
{
	var popup_num="popup_"+number;
	document.getElementById(popup_num).style.visibility = "hidden";
	document.getElementById(popup_num).style.display = "none";
	//document.getElementById('hide_content').style.visibility = "hidden";
	//document.getElementById('hide_content').style.display = "none";
}