var tabbgimagepath = "" ;
	var tabbgimagetype = "" ;
	var debug = false ;
	function slider (tab)
	{
		var tabname = gettabgroupname (tab.id) ;
		if (tabname == '')
		{
			alert ("no tabname for tab [" + tab.id + "]") ;
			return ;
		}
		var index = 1 ;
		while (true)
		{
			var tabtitle = document.getelementbyid (tabname + '_' + index) ;
			if (tabtitle == undefined)
				break ;
			deontabtitle (tabtitle , tabname) ;
			var tabcontent = document.getelementbyid (tabname + '_' + index + '_content') ;
			if (tabcontent != undefined)
				tabcontent.style.display = "none" ;
			index ++ ;
		}
		
		if (debug)
			alert ("find " + (index - 1) + " tab title(s) for tabname [" + tabname + "]") ;
		ontabtitle (tab , tabname) ;
		var tabcontent = document.getelementbyid (tab.id + '_content') ;
		if (tabcontent != undefined)
			tabcontent.style.display = "block" ;
		var tabheader = document.getelementbyid (tabname + "_header") ;
		if (tabheader != undefined)
		{
			tabheader.classname = "tabheader_" + tab.id ; 
		}
	}
	function slider1 (tab)
	{
		var tabname = gettabgroupname (tab.id) ;
		if (tabname == '')
		{
			alert ("no tabname for tab [" + tab.id + "]") ;
			return ;
		}
		var index = 1 ;
		while (true)
		{
			var tabtitle = document.getelementbyid (tabname + '_' + index) ;
			if (tabtitle == undefined)
				break ;
			deontabtitle (tabtitle , tabname) ;
			var tabcontent = document.getelementbyid (tabname + '_' + index + '_content') ;
			if (tabcontent != undefined)
				tabcontent.style.display = "none" ;
			index ++ ;
		}
		
		if (debug)
			alert ("find " + (index - 1) + " tab title(s) for tabname [" + tabname + "]") ;
		ontabtitle (tab , tabname) ;
		var tabcontent = document.getelementbyid (tab.id + '_content') ;
		if (tabcontent != undefined)
			tabcontent.style.display = "block" ;
		var tabheader = document.getelementbyid (tabname + "_header") ;
		if (tabheader != undefined)
		{
			tabheader.classname = "tabheader_" + tab.id ; 
		}
	}


	function gettabgroupname (tabid)
	{
		if (tabid == '' || tabid == undefined)
		{
			alert ("tabid is null! [" + tabid + "]") ;
			return ;
		}
		var i = tabid.lastindexof ('_') ;
		if (i <= 1)
			return '' ;
		return tabid.substr (0 , i) ;
	}
	function deontabtitle (tab , tabname)
	{
		tab.classname = tabname + "_off" ;
	}
	function ontabtitle (tab , tabname)
	{
		tab.classname = tabname + "_on" ;
	}