function openWindow(contentURL,windowName,windowWidth,windowHeight) {
		var widthHeight = 'height=' + windowHeight + ',width=' + windowWidth;
		var windowFeatures = 'scrollbars=1, resizable=1,'+widthHeight;
		newWindow = window.open( contentURL ,windowName, windowFeatures);
		newWindow.focus()
}
function closeWindow() {
	if (newWindow != null)  {	
	 newWindow.close();	 
	 newWindow = null;
	}
}
function toggleWindow(contentURL,windowName,windowWidth,windowHeight) {
	if (newWindow == null) {
		var widthHeight = 'height=' + windowHeight + ',width=' + windowWidth;
		var windowFeatures = 'scrollbars=1, resizable=1,'+widthHeight;
		newWindow = window.open( contentURL ,windowName, windowFeatures);
		newWindow.focus()
	}
	else {	
	 	newWindow.close();	
		newWindow = null;
	}
}