function checkScroll() {
	var winHeight = window.getHeight();
	if (winHeight < 600) {
		$$('html').setStyle('overflow', 'auto');
		$('maincontainer').setStyle('height','600px');
	} else {
		$$('html').setStyle('overflow', 'hidden');
		$('maincontainer').setStyle('height','100%');
	}
	
	var winWidth = window.getWidth();
	if (winWidth < 1000) {
		$('maincontainer').setStyle('width','1000px');
	} else {
		$('maincontainer').setStyle('width','100%');
	}
	
}

window.addEvent ('resize', function() {
	checkScroll();						  
});

window.addEvent('domready', function() {
	checkScroll();
});