function initPage(){
	var _width = 0;
	var _left = document.getElementById('left-col');
	var _right = document.getElementById('right-col');
	var _minOffset = -220;
	var _offset = 0;

	if (window.innerHeight) _width = window.innerWidth;
	else _width = document.documentElement.clientWidth;
	_offset = Math.ceil((_width - 1024)/2) + _minOffset;
	if(_offset <= _minOffset) _offset = _minOffset;
	if(_offset >= 0) _offset = 0;
	_left.style.left = _offset+'px';
	_right.style.right = _offset+'px';

	window.onresize = function(){
		if (window.innerHeight) _width = window.innerWidth;
		else _width = document.documentElement.clientWidth;
		_offset = Math.ceil((_width - 1024)/2) + _minOffset;
		if(_offset <= _minOffset) _offset = _minOffset;
		if(_offset >= 0) _offset = 0;
		_left.style.left = _offset+'px';
		_right.style.right = _offset+'px';
	}
}
if (window.addEventListener) window.addEventListener("load", initPage, false);
else if (window.attachEvent) window.attachEvent("onload", initPage);