window.onresize = function abc() {
if(document.body.clientWidth<1000) {
	document.getElementById('hiddenBg').style.display = 'block';
	}
else {
	document.getElementById('hiddenBg').style.display = 'none';
	}
}


function randomImg() {
	var img = ["<a href='adv01.html'><img src='img/b452a.jpg' alt='' /></a>","<a href='adv02.html'><img src='img/b452b.jpg' alt='' /></a>","<a href='adv03.html'><img src='img/b452c.jpg' alt='' /></a>"];
	var x = Math.random()*10;
	if(x<=3) {
		document.getElementById('banner452').innerHTML = img[0];
		}
	else if(x>3 && x<=7) {
		document.getElementById('banner452').innerHTML = img[1];
		}
	else if (x>7){
		document.getElementById('banner452').innerHTML = img[2];
		}
	}