var elements_num = 0;
	function get_string()
	{
		var s = "";
		for ( var i = 0 ; i < document.user_form.su.value ; i++ )
		{
			if ( document.user_form.elements[elements_num+i].checked )
			{
			s += (( s.length > 0 ? "," : "" ) + document.user_form.elements[elements_num+i].value );
			}
		}
		return s;
	}

	function get_message()
	{
		for ( var i = 0 ; i < document.user_form.su.value ; i++ )
		{
			if ( !document.user_form.elements[elements_num+i].checked )
				return document.user_form.elements[elements_num+i].value;
		}
		return "";
	}

	function join1() {
		var s = get_string();
		var s2,s_num;
		var unselected_message = get_message();
		s2 = s.split(",");
		s_num = s2.length;
		if ( s == "" )
		{
            openWin = open('../jjim.php','jjim','toolbar=no, scrollbars=yes,resizable=yes, memer=no, width=800,height=500');
			openWin.focus();
            return;
		}
		openWin = open('../jjim.php?idx='+s+'&total_num='+s_num+'&flag='+document.user_form.flag.value,'jjim','toolbar=no, scrollbars=yes,resizable=yes, memer=no, width=800,height=500');
		openWin.focus();
	}