var position = 0;
var container = null;
var containerId = 'main_container'
var containerWidth = 775;

function fixContainerPosition()
{
	if (document.all) {
		return false;
	}

	if (window.innerWidth) {
		width = window.innerWidth;
	} else if (document.documentElement) {
		width = document.documentElement.clientWidth;
	} else if (document.body) {
		width = document.body.clientWidth;
	} else {
		return false;
	}

	if ((position = (width - containerWidth) / 2) < 0) {
		position = 0;
	}

	if ((container = document.getElementById(containerId))) {
		container.style.left = position + 'px';
	} else {
		document.writeln('<style type="text/css">#' + containerId + ' { position : absolute; left : ' + position + 'px; }</style>');
	}
}

fixContainerPosition();
window.onresize = fixContainerPosition;