// Open - close new window
var newWindow = null;

function openWindow(contentURL,windowName,windowWidth,windowHeight) {
		 widthHeight = 'resizable=yes,scrollbars=yes, height=' + windowHeight + ',width=' + windowWidth;
		 newWindow = window.open(contentURL,windowName,widthHeight);
		 
		 newWindow.focus()
}

function closeWindow() {

	if (newWindow != null) {

		newWindow.close();
		newWindow = null;
	}
}