imageOn = new Image();
imageOn.src = 'images/bg_menu_on.gif';

imageOff = new Image();
imageOff.src = 'images/bg_menu_off.gif';

imageSel = new Image();
imageSel.src = 'images/bg_menu_sel.gif';

current = null;

/*
function openMenu(objID) {
  var i = 1;
  while ( document.getElementById('menu'+i) ) {
    var ob = document.getElementById('menu'+i).style;
    ob.display = 'none';
    i++;
  }
  toggleMenu(objID);
}
*/

function openMenu(id) {
  var i = 1;
  while ( document.getElementById('menu'+i) ) {
    var obh = document.getElementById('head'+i).style;
    obh.backgroundImage = 'url('+imageOff.src+')';
    
    var ob = document.getElementById('menu'+i).style;
    ob.display = 'none';
    i++;
  }
  obh = document.getElementById('head'+id).style;
  obh.backgroundImage = 'url('+imageSel.src+')';
  toggleMenu('menu'+id);
}

function toggleMenu(objID) {
  current = objID;
  if (!document.getElementById) return;
  var ob = document.getElementById(objID).style;
  ob.display = (ob.display == 'block')?'none': 'block';
}

function mouseOver(obj) {
  if ( obj.style.backgroundImage != 'url('+imageSel.src+')')
    obj.style.backgroundImage = 'url('+imageOn.src+')';
}

function mouseOut(obj) {
  if ( obj.style.backgroundImage != 'url('+imageSel.src+')')
    obj.style.backgroundImage = 'url('+imageOff.src+')';
}

function linkOver(obj) {
  obj.style.backgroundColor = '#b5b4b4';
}

function linkOut(obj) {
  obj.style.backgroundColor = '#d6d6d6';
}

function loadPage(id,page) {
  Set_Cookie('current', id);
  document.location.href = page;
}


function setMenu() {
  var id = Get_Cookie( 'current' );

  if ( selected = document.getElementById(id) ) {
    //alert(selected.parentNode.getAttributeNode('id').value.substring(4,5));
    openMenu(selected.parentNode.getAttributeNode('id').value.substring(4,5));
  }
}


function Set_Cookie( name, value, expires, path, domain, secure ) {
    // set time, it's in milliseconds
    var today = new Date();
    today.setTime( today.getTime() );
    
    /*
    if the expires variable is set, make the correct
    expires time, the current script below will set
    it for x number of days, to make it for hours,
    delete * 24, for minutes, delete * 60 * 24
    */
    if ( expires ) {
        expires = expires * 1000 * 60 * 60 * 24;
    }
    var expires_date = new Date( today.getTime() + (expires) );
    
    document.cookie = name + "=" +escape( value ) +
    ( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
    ( ( path ) ? ";path=" + path : "" ) +
    ( ( domain ) ? ";domain=" + domain : "" ) +
    ( ( secure ) ? ";secure" : "" );
}

// this fixes an issue with the old method, ambiguous values
// with this test document.cookie.indexOf( name + "=" );
function Get_Cookie( check_name ) {
	// first we'll split this cookie up into name/value pairs
	// note: document.cookie only returns name=value, not the other components
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; // set boolean t/f default f

	for ( i = 0; i < a_all_cookies.length; i++ )
	{
		// now we'll split apart each name=value pair
		a_temp_cookie = a_all_cookies[i].split( '=' );


		// and trim left/right whitespace while we're at it
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

		// if the extracted name matches passed check_name
		if ( cookie_name == check_name )
		{
			b_cookie_found = true;
			// we need to handle case where cookie has no value but exists (no = sign, that is):
			if ( a_temp_cookie.length > 1 )
			{
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			// note that in cases where cookie is initialized but no value, null is returned
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found )
	{
		return null;
	}
}

// this deletes the cookie when called
function Delete_Cookie( name, path, domain ) {
    if ( Get_Cookie( name ) ) document.cookie = name + "=" +
    ( ( path ) ? ";path=" + path : "") +
    ( ( domain ) ? ";domain=" + domain : "" ) +
    ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}