function imgSwap(id,src) {
	document.getElementById(id).src=src;
}

function tweakStyle() {
	var lists=document.getElementsByTagName("ul");
	for (var li=0; li<lists.length; li++) {
		lists[li].style.listStyleImage="url(http://www.comserv-usa.com/_images/bullet.jpg)";
	}
}

tweakStyle();