function winOpen(URL, windowName, width, height, left, top, resizable, location, menubar, scrollbars, status, toolbar, directories){
	var windowFeatures;
	windowFeatures = '';
	if (width != '')
		windowFeatures = windowFeatures+'width='+width+',';
	if (height != '')
		windowFeatures = windowFeatures+'height='+height+',';
	if (left != '')
		windowFeatures = windowFeatures+'left='+(screen.width-width)/2+',';
	if (top != '')
		windowFeatures = windowFeatures+'top='+(screen.height-height)/2+',';
	if (resizable)
		windowFeatures = windowFeatures+'resizable,';
	if (location)
		windowFeatures = windowFeatures+'location,';
	if (menubar)
		windowFeatures = windowFeatures+'menubar,';
	if (scrollbars)
		windowFeatures = windowFeatures+'scrollbars,';
	if (status)
		windowFeatures = windowFeatures+'status,';
	if (toolbar)
		windowFeatures = windowFeatures+'toolbar,';
	if (directories)
		windowFeatures = windowFeatures+'directories,';
	window.open(URL, windowName, windowFeatures);
}