function alignContent(){
	if(document.getElementById('content').offsetWidth > 600){
		document.getElementById('content').style.width = '600px';
		document.getElementById('content').style.left = '-300px';
	}else{
		document.getElementById('content').style.left = '-' + parseInt(document.getElementById('content').offsetWidth/2).toString() + 'px';
	}
}
document.addEventListener('resize',alignContent,false);