//0 means disabled; 1 means enabled;
var popupStatus = 0;
var gPopName = "";

function loadPopup(popName)
{
	//loads popup only if it is disabled
	if(popupStatus==0)
	{
		gPopName = popName;
		$("#backgroundPopup").css({"opacity": "0.7"});
		$("#backgroundPopup").fadeIn("slow");
		$("#" + popName).fadeIn("slow");
		popupStatus = 1;
	}
}

function disablePopup()
{
	if ((popupStatus==1) && (gPopName != ""))
	{
		$("#backgroundPopup").fadeOut("slow");
		$("#" + gPopName).fadeOut("slow");
		popupStatus = 0;
		gPopName = "";
	}
}

function centerPopup(popName,iHeight)
{
	var windowWidth = document.documentElement.clientWidth;
	var windowHeight = document.documentElement.clientHeight;
	var popupHeight = iHeight; //$("#" + popName).height();
	var popupWidth = $("#" + popName).width();

	$("#" + popName).css({
		"position": "absolute",
		"top": windowHeight/2-popupHeight/2,
		"left": windowWidth/2-popupWidth/2,
		"height":iHeight + "px"
	});
	//only need force for IE6
	
	$("#backgroundPopup").css({
		"height": windowHeight
	});
	
}