function create_popup(){
	var elem = document.getElementById('popup_content');
	var winTop = 100;
	var winLeft = 100;
	var windowFeatures = "width=450,height=600,scrollbars=yes,";
	windowFeatures = windowFeatures + "left=" + winLeft + ",";
	windowFeatures = windowFeatures + "top=" + winTop;
	var imgWindow;
	imgWindow = window.open(url+"/feedback","blank",windowFeatures);
	imgWindow.document.close();
	return;
}