var hwndScreen = null;
function showScreenshot(url) {
	if(hwndScreen != null) hwndScreen.close();
	hwndScreen = openCentered("screenshot.html?img=" + url, "hwndScreen", 1000,750);
	
}
function isEmailAddress(str) {
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	return filter.test(str);
}
function openCentered(url, name, width, height, params) {
	if(screen.width) {
		var x = (screen.width / 2) - (width / 2);
		var y = (screen.height / 2) - (height / 2) - 50;	
		params += ",width=" + width + ",height=" + height + ",screenX=" + x + ",screenY=" + y + ",left=" + x + ",top=" + y + ",scrollbars=yes, resizable=yes";	
	}
	else
	{
		params += ",width=" + width + ",height=" + height + ",scrollbars=yes, resizable=yes";
	}
	return window.open(url, name, params);
}