// +++++++++++++++++++++++++ pulldown navigation script +++++++++++++++++++++++++
function changeUrl(url) {
	if (url != "") {
		window.location = url;
	}
}


//+++++++++++++++++++++++++ pre-cache images +++++++++++++++++++++++++
if (document.images) {
	header_toc_off = new Image();
	header_toc_off.src = "images/header_toc_off.gif";
	header_toc_on = new Image();
	header_toc_on.src = "images/header_toc_on.gif";
	header_home_off = new Image();
	header_home_off.src = "images/header_home_off.gif";
	header_home_on = new Image();
	header_home_on.src = "images/header_home_on.gif";
}


//+++++++++++++++++++++++++ rollover script +++++++++++++++++++++++++
function rollOver(imgName) {
	if (document.images) {
		document[imgName].src = self[imgName + "_on"].src;
	}
}

function rollOut(imgName) {
	if (document.images) {
		document[imgName].src = self[imgName + "_off"].src;
	}
}