var bgPics = new Array("1.png","2.png","3.png")

function changeImage(){
	var num=(Math.round(Math.random()*(bgPics.length-1)))
	var bgimage=bgPics[num]
	document.getElementById("banner").style.backgroundImage = "url('images/bnr" + bgimage + "')";
	
	switch (num){
		case 0:
			document.getElementById("bnrPhone").style.margin = "10px";
			break;
		case 1:
			document.getElementById("bnrPhone").style.margin = "195px 10px 0 0";
			break;
		case 2:
			document.getElementById("bnrPhone").style.margin = "195px 90px 0 0";
			break;
			
		default: break;
	}
}