var aRollovers = [
	"nav_home",
	"nav_system",
	"nav_testimonials",
	"nav_courses",
	"nav_products",
	"nav_services",
	"nav_faq",
	"nav_aboutus",
	"nav_contactus",
	"nav_pettibon_blog",
	"nav_doctors",
	"txt_click_here_to_download",
	"<jpg marker>",
	"pic_burl_p_pettibon"
];

var ext = ".gif'";

// preload
for(var i=0; i<aRollovers.length; i++) {
	if(aRollovers[i].indexOf("<jpg marker>")!=-1) {
		ext = ".jpg'";
		continue;
	}
	eval("var " + aRollovers[i] + "=new Image()");
	eval(aRollovers[i] + ".src='" + sImgPath + aRollovers[i] + ext);
	eval("var " + aRollovers[i] + "_on=new Image()");
	eval(aRollovers[i] + "_on.src='" + sImgPath + aRollovers[i] + "_on" + ext);
}

function swapImage(name, state) {
	document.images[name].src = eval( name + state + ".src" );
}

var newWin = null;
function openWin(url, w, h) {
	var props = "width=" + w + ",height=" + h + ",menubar=no,toolbar=no,personalbar=no,statusbar=yes,copyhistory=no,resizable=no,scrollbars=1";
	if(newWin != null && !newWin.closed) {
		newWin.focus();
	}
	newWin = window.open(url, 'newWin', props);
}