var g_lastPopupTd = null;
function openPopup(id)
{
	var x = 0;
	var bEnd = false;

	while (!bEnd)
	{
		var elem = document.getElementsByTagName("div")[x];
		if (elem != null)
		{
		    if (elem.id != null && elem.id.indexOf("td") >= 0 && id != g_lastPopupTd)
				elem.style.display="none";
			x++;
		}
		else
			bEnd=true;
	}

/*
	if (g_lastPopupTd != null && g_lastPopupTd != id)
	{
		var elem = document.getElementById("td" + g_lastPopupTd);
		if (elem != null)
			elem.style.display="none";

	}	
*/
	if (g_lastPopupTd != id)
	{
		var elem = document.getElementById("td" + id);
		if (elem != null)
		{
			elem.style.display="block";
			g_lastPopupTd = id;
		}
		else
			g_lastPopupTd = null;
	}	
	else
	{
		g_lastPopupTd = null;
	}
}