function openViewer(url) {
	if(url == "") return;
	
	var openWindow = window.open(url, 'pcviewer', 'width=400, height=300, resizable=yes,status=no,menubar=no, toolbar=no, scrollbars=no');
	
	if ( openWindow ) {
		openWindow.opener = window;
		openWindow.focus();
	}
	
	return openWindow;
}