function swap1( div_id )
{
	var obj = document.getElementById(div_id) ;

	if ( obj.style.visibility == "visible" ) obj.style.visibility = "hidden" ;
	else obj.style.visibility = "visible" ;
/*
	if ( obj.style.display == "block" ) obj.style.display = "none" ;
	else obj.style.display = "block" ;
*/
}


function swap2( div_id )
{
	var obj = document.getElementById(div_id) ;

	if ( obj.style.display == "block" ) obj.style.display = "none" ;
	else obj.style.display = "block" ;

}

function swap( div_id )
{
	var obj = document.getElementById(div_id) ;

	if ( obj.style.left < 0 ) obj.style.left = 250 ;
	else obj.style.left = -1000 ;

}

function showDivInfo( div_id )
{
	var obj = document.getElementById(div_id) ;
	var s = "" ;

	s += "x-pos : " + obj.style.left + "\n" ;
	s += "y-pos : " + obj.style.top + "\n" ;
	s += "x-dim : " + obj.style.width + "\n" ;
	s += "y-dim : " + obj.style.height + "\n" ;

	alert ( s ) ;
}

	//var g_CurrentItem = 0 ;
	var pi = null ;
	var mi = null ;

	var PG_INDEX = 1 ;
	var PG_NEWS = 2 ;
	var PG_MAP = 3 ;
	var PG_UCHKI = 4 ;
	var PG_TECHNO = 5 ;
	var PG_CONTACT = 6 ;

	var PAGE_ID = PG_INDEX ; // default
	var mi = null ;

	var root = new SP_MenuItem( 0, "mm", "mm_class" ) ;
	
	pi = AddItem ( root, PG_INDEX, "pi0", "pi_class" ) ;
	pi.txt = "о проекте" ;
	pi.lnk = "./index.html"
	//	mi = AddItem ( pi, 10, "pi0_mi0", "mi_class" ) ;
	//	mi.txt = "mitem p1 m1 " ;
		
	pi = AddItem (  root, PG_NEWS, "pi1", "pi_class" ) ;
	pi.txt = "новости" ;
	pi.lnk = "./news.html"
		
	pi = AddItem (  root, PG_MAP, "pi2", "pi_class" ) ;
	pi.txt = "панорама" ;
	pi.lnk = "./mapview.html"

	pi = AddItem (  root, PG_UCHKI, "pi3", "pi_class" ) ;
	pi.txt = "участники" ;
	pi.lnk = "./uch_ki.html"

	pi = AddItem (  root, PG_TECHNO, "pi4", "pi_class" ) ;
	pi.txt = "технологии" ;
	pi.lnk = "./techno.html"

	
	pi = AddItem (  root, PG_CONTACT, "pi5", "pi_class" ) ;
	pi.txt = "контакты" ;
	pi.lnk = "./contact.html"