function rollover(id) {
	var control = $("#" + id);
	if (control.attr("src").indexOf("_over") != -1) {
		control.attr("src", control.attr("src").replace("_over", "_off"));
	}
	else {
		control.attr("src", control.attr("src").replace("_off", "_over"));
	}
}

function bottomroll(state) {
	var navbottom = $("#navround");
	var navlastlink = $("#lastnavitem");

	if (state == "over") {
		navbottom.attr("class", "navItem_bottom_over");
		navlastlink.attr("class", "navItem_over");
	}
	else {
		navbottom.attr("class", "navItem_bottom");
		navlastlink.attr("class", "navItem");
	}
}

function rollIndexCallouts(callout, state) {
	var rollerTd = $("#" + callout + "callout");

	if (state == "over")
		rollerTd.attr("class", callout + "_over");
	else
		rollerTd.attr("class", callout);
}