function setbg(style) {
	style.background = "url('img/bannerh.png')";
}
function unsetbg(style, i) {
	style.background  = "url('img/banner"+i+".png')";
}
function mon(item) {
	item.style.backgroundColor = '#DBDBDB';
}
function mout(item) {
    item.style.backgroundColor = '#FFFFFF';
}
function bgm() {
	document.getElementById('banners').innerHTML = document.getElementById('migrate').innerHTML;
	document.getElementById('migrate').innerHTML = "";
}