addEvent(fm.elements[‘a1‘], ‘keyup‘, tabForWard);    addEvent(fm.elements[‘a2‘], ‘keyup‘, tabForWard);    addEvent(fm.elements[‘a3‘], ‘keyup‘, tabForWard);    function tabForWard(evt){        var e = evt || window.event;        if(this.value.length == this.maxLength){            for(var i=0; i<fm.elements.length; i++){                if(fm.elements[i] == this){                    fm.elements[i+1].focus();                    return;                }            }        }    }