// Set periodical function
new PeriodicalExecuter(function() {
	newHeight = document.viewport.getHeight()-128; 
	if (newHeight < 400) newHeight = 400;
	if ((BrowserDetect.browser == 'Explorer') && (BrowserDetect.version == 6))
		newHeight -= 2;
	$('content').setStyle({height: newHeight+'px'});
	$('menu').setStyle({height: newHeight+'px'});
}, 0.1);

alert;