var picnum = Math.floor(Math.random()*16); //random between 0 and N (N not included)
var picList = new Array;

//fill picList with banner sources
picList[0] = '/images/ordernow_beach_banner.jpg';
picList[1] = '/images/ordernow_climbing_banner.jpg';
picList[2] = '/images/ordernow_golf_banner.jpg';
picList[3] = '/images/ordernow_versieren_banner.jpg';
picList[4] = '/images/ordernow_salsa_banner.jpg';
picList[5] = '/images/ordernow_soccergirls_banner.jpg';
picList[6] = '/images/ordernow_bbq_banner.jpg';
picList[7] = '/images/ordernow_partygirls_banner.jpg';
picList[8] = '/images/ordernow_watchgame_banner.jpg';
picList[9] = '/images/ordernow_playwithkid_banner.jpg';
picList[10] = '/images/ordernow_mountainbike_banner.jpg';
picList[11] = '/images/ordernow_toastgirls_banner.jpg';
picList[12] = '/images/ordernow_fishing_banner.jpg';
picList[13] = '/images/ordernow_sailing_banner.jpg';
picList[14] = '/images/ordernow_skiing_banner.jpg';
picList[15] = '/images/ordernow_spacewalk_banner.jpg';

function setBackBannerImage () {
	document.getElementById('bannerimg').style.backgroundImage = 'url(' + picList[picnum] + ')';
	picnum++;
	if (picnum >= picList.length) {
		picnum = 0;
	}
	setTimeout ("setBackBannerImage()", 4000);
}