function toggle_navigation_container(showHideBool) {

	var navigation_container_obj = document.getElementById("navigation_container");
	
	if( navigation_container_obj ) {
		if( showHideBool ) {
			navigation_container_obj.style.zIndex = "1001"
			/*navigation_container_obj.style.backgroundImage = "url(/static/images/siteMainGraphics/navigation_background.gif)";
			navigation_container_obj.style.opacity = "0.8"; // Safari
			navigation_container_obj.style.filter = "alpha(opacity=80)"; // Internet Explorer
			navigation_container_obj.style.mozOpacity = "0.8"; // Mozilla 1.6 and below*/
		}
		else {
			navigation_container_obj.style.zIndex = "2"
			//navigation_container_obj.style.backgroundImage = "none"; //"url(/static/images/siteMainGraphics/spacing.gif)";
		}
	}
	
}