var bbIndexes = 4;
var bbObj, bbDivs, bbImgs;

function bigBannerInit() {
	bbObj = document.getElementById('bigbanner');
	bbDivs = bbObj.getElementsByTagName('div');
	bbImgs = bbObj.getElementsByTagName('img');
	for (i=0; i<bbDivs.length; i++) {
		bbIndexes--;
		bbImgs[i].style.zIndex = bbIndexes;
		bbDivs[i].bbImageId = bbImgs[i].id;
		bbDivs[i].onmouseover = function (e) {
			for (k=0; k<bbDivs.length; k++) bbDivs[k].className = '';
			bbIndexes++;
			document.getElementById(this.bbImageId).style.zIndex = bbIndexes;
			this.className = 'sel';
			
		}
	}
	bbIndexes = j;
}

dsAddEvent(window, 'load', bigBannerInit);