var main,left,right;

function init(){
	//alert(document.body.clientWidth+','+document.body.clientHeight);
	main = document.getElementById('main');
	left = document.getElementById('left');
	right = document.getElementById('right');
	main.style.marginLeft = (document.body.clientWidth - 978)/2;
	left.style.height = right.style.height = left.parentNode.offsetHeight + 'px';
}

window.onload = init;