function openPopup(url) {
	centerPopup();
	loadPopup();
	$("#popupIFrame").attr("src",url);
}

var popupStatus=0;
function loadPopup() {
	if(popupStatus==0) {
		$("#backgroundPopup").css({
			"opacity": "0.7"
		});
		$("#backgroundPopup").fadeIn("slow");
		$("#popupContent").fadeIn("slow");
		popupStatus=1;
	}
}

function disablePopup() {
	if(popupStatus!=0) {
		$("#backgroundPopup").fadeOut("slow");
		$("#popupContent").fadeOut("slow");
		popupStatus=0;
	}
}

function centerPopup() {
	var windowWidth = document.documentElement.clientWidth;
	var windowHeight = document.documentElement.clientHeight;
	var popupHeight = $("#popupContent").height();
	var popupWidth = $("#popupContent").width();
	$("#popupContent").css({
		"position": "absolute",
		"top": windowHeight/2-popupHeight/2,
		"left": windowWidth/2-popupWidth/2
	});
	//IE6
	$("#backgroundPopup").css({
		"height": windowHeight
	});
}