function chkbox_checkedcount2(frm, frn){
	var chkbox_cnt = 0;

	if(eval("document." + frm + "." + frn).length == undefined){
		if(eval("document." + frm + "." + frn).checked == true){
			chkbox_cnt += 1;
		}
	}else{
		for(i=0;i<eval("document." + frm + "." + frn).length;i++){
			if(eval("document." + frm + "." + frn)[i].checked == true){
				chkbox_cnt += 1;
			}
		}
	}
	return chkbox_cnt
}

function chkbox_checkup2(thisfrm, frm, frn){	
	if(chkbox_checkedcount2(frm, frn) > "5"){
		thisfrm.checked = false;
		err_msg('checkupto5','x')		
	}
}