jquery - 如何从文本框中获取值？

Question

嗨大家我试图在用户使用jquery点击文本框时获取文本框的值,但是当我使用alert()来查看这里的值时,我得到了:

function (value) {
var hooks, ret, elem = this[0];
if (!arguments.length) {
    if (elem) {
        hooks = jQuery.valHooks[elem.nodeName.toLowerCase()] ||
            jQuery.valHooks[elem.type];
        if (hooks &&
            "get" in hooks &&
            (ret = hooks.get(elem, "value")) !== undefined) {
            return ret;
        }
        ret = elem.value;
        return typeof ret === "string" ? ret.replace(rreturn, "") : ret == null ? "" : ret;
    }
    return undefined;
}
var isFunction = jQuery.isFunction(value);
return this.each(function (i) {var self = jQuery(this), val;if (this.nodeType !== 1) {return;}if (isFunction) {val = value.call(this, i, self.val());} else {val = value;}if (val == null) {val = "";} else if (typeof val === "number") {val += "";} else if (jQuery.isArray(val)) {val = jQuery.map(val, function (value) {return value == null ? "" : value + "";});}hooks = jQuery.valHooks[this.nodeName.toLowerCase()] || jQuery.valHooks[this.type];if (!hooks || !("set" in hooks) || hooks.set(this, val, "value") === undefined) {this.value = val;}});}

这是我的代码:http://jsfiddle.net/QYHXu/1/

请帮忙.非常感谢提前.

Answer 1

$(this).val

......是一个功能.

$(this).val()

...是该函数的返回值.使用$(this).val().