Form表单值转换为[{name:'',value}]键值对

  /**
     * 表单值转换为[{name:'',value}]键值对
     * */
    formToArray : function ($form) {
    var a = [];
    if ($form.length === 0) {
        return a;
    }
    var form = $form[0];
    var els = form.elements;
    if (!els) {
        return a;
    }
    var i, j, n, v, el, max, jmax;
    for (i = 0, max = els.length; i < max; i++) {
        el = els[i];
        n = el.name;
        if (!n) {
            continue;
        }
        if ((el.type == 'radio' || el.type == 'checkbox') && $(el).prop("checked") !== true) {
            continue;
        }
        v = $.trim($(el).val());
        if (v && v.constructor === Array) {
            for (j = 0, jmax = v.length; j < jmax; j++) {
                a.push({name: n, value: v[j]});
            }
        }
        else if (v !== null && typeof v != 'undefined' && v !== '') {
            a.push({name: n, value: v});
        }
    }
    return a;
},