// change visibility of element

function getStyleObject(objectId) {

	if(document.getElementById && document.getElementById(objectId)) {

		return document.getElementById(objectId).style;

	} else if (document.all && document.all(objectId)) {

		return document.all(objectId).style;

	} else if (document.layers && document.layers[objectId]) {

		return getObjNN4(document,objectId);

	} else {

		return false;

	}

}



function changeObjectVisibility(objectId, newVisibility) {

    var styleObject = getStyleObject(objectId, document);

    if(styleObject) {

	styleObject.display = newVisibility;

	return true;

    } else {

	return false;

    }

}







// Functions for the navigation



var g_strNavSection = String("");



function NavSectionClick( strSection ) {



	// Hide the current section

	if ( g_strNavSection != "" ) {

		DocumentObject( "nav-section-" + g_strNavSection, true ).display = 'none';

	}

	if ( g_strNavSection == strSection ) {

		g_strNavSection = "";

	} else {

		DocumentObject( "nav-section-" + strSection, true ).display = 'block';

		g_strNavSection = strSection;

	}

}



var g_strNavMenu = String("")

var g_iMenuTimerID = Number(0);



function NavMenuOver( strMenu ) {



	// Clear the timeout, if any

	clearTimeout( g_iMenuTimerID );

	g_iMenuTimerID = 0;



	// Hide the existing menu, if any

	if ( g_strNavMenu != strMenu  &&  g_strNavMenu != "" ) {

		DocumentObject( "nav-menu-" + g_strNavMenu, true ).display = 'none';

	}

	DocumentObject( "nav-menu-" + strMenu, true ).display = 'block';

	g_strNavMenu = strMenu;

}



function NavMenuOut( strMenu ) {



	// Clear the timeout, if any

	clearTimeout( g_iMenuTimerID );

	g_iMenuTimerID = 0;

	

	// Set a new timer

	g_iMenuTimerID = setTimeout( 'NavHideMenus();', 500 );

}



function NavHideMenus( ) {



	// Clear the timeout, if any

	clearTimeout( g_iMenuTimerID );

	g_iMenuTimerID = 0;

	

	if ( g_strNavMenu != "" ) {

		DocumentObject( "nav-menu-" + g_strNavMenu, true ).display = 'none';

		g_strNavMenu = "";

	}

}



function NavMenuItemOver( ) {



	// Clear the timeout, if any

	clearTimeout( g_iMenuTimerID );

	g_iMenuTimerID = 0;

}



function NavMenuItemOut( ) {



	// Clear the timeout, if any

	clearTimeout( g_iMenuTimerID );

	g_iMenuTimerID = 0;



	// Set a new timer

	g_iMenuTimerID = setTimeout( 'NavHideMenus();', 1000 );

}



// Document manipulation functions

function DocumentObject( strObjectID, bWithStyle ) {

	if (bWithStyle) {

		if (document.getElementById) return (document.getElementById(strObjectID).style); 

		else if (document.all) return (document.all[strObjectID].style); 

		else if ((navigator.appName.indexOf('Netscape') != -1) && (parseInt(navigator.appVersion) == 4)) return (document.layers[strObjectID]); 

	} else {

		if (document.getElementById) return (document.getElementById(strObjectID)) ; 

		else if (document.all) return (document.all[strObjectID]); 

		else if ((navigator.appName.indexOf('Netscape') != -1) && (parseInt(navigator.appVersion) == 4)) return (document.layers[strObjectID]); 

	}

}