function focusValueField() {
    var valueInput = document.getElementById('id_value');
    if(valueInput!=null){
        valueInput.focus();
    }
}


function registerEventHandler(obj, evType, fn) {
    if (obj.addEventListener) {
        obj.addEventListener(evType, fn, false);
        return true;
    } else if (obj.attachEvent){
        var r = obj.attachEvent("on"+evType, fn);
        return r;
    } else {
        return false;
    }
}
registerEventHandler(window, 'load', focusValueField);