function getClientWidth(){
  return document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientWidth:document.body.clientWidth;
}

function check_banners(){  
	var theWidthNew = getClientWidth();
	if ( theWidth != theWidthNew ){
		var te = document.getElementById('banner_5');
		var te1 = document.getElementById('banner_1');
		var te2 = document.getElementById('banner_2');
		var te3 = document.getElementById('banner_3');
		var te4 = document.getElementById('banner_4');
		if ( te ) {
			if ( theWidthNew <= 1155 ) {
				te.className = 'hide_div';te1.className = 'banner-wrap2';te2.className = 'banner-wrap2';te3.className = 'banner-wrap2';te4.className = 'banner-wrap2';
			}
			else {
				te.className = 'banner-wrap';te1.className = 'banner-wrap';te2.className = 'banner-wrap';te3.className = 'banner-wrap';te4.className = 'banner-wrap';
			}
		}
	}
	theWidth = theWidthNew;
}

var theWidth = 0;
window.setInterval("check_banners()", 10 );