function bannerAdjustments(){
	w = document.all ? document.body.offsetWidth : window.innerWidth;

	document.getElementById('banner_left').style.display = (w<1260 ? 'none' : 'block');
	document.getElementById('banner_right').style.display = (w<1260 ? 'none' : 'block');
}

window.onresize = function () {
	bannerAdjustments();
}

window.onLoad = function () {
	bannerAdjustments();	
}