jQuery选择器:通过ID解决提交按钮失败 [英] jQuery selector: addressing a submit button by ID fails

问题描述

提供一个提交按钮:

<input type="submit" value="Sign Up" name="AddToCart" size="2" id="AddToCart" />

此代码为什么不禁用按钮:

why wouldn't this code disable the button:

$('#AddToCart').attr(disabled, 'disabled');

mny thx

推荐答案

传递给 .attr()的属性名称必须用引号引起来，像这样:

The attribute name passed to .attr() needs to be in quotes, like this:

$('#AddToCart').attr('disabled', 'disabled');
//or without quotes, as an object:
$('#AddToCart').attr({ disabled: 'disabled' });

还要确保它正在document.ready事件处理程序中或元素就绪后的其他地方运行，例如:

Also make sure this is running in a document.ready event handler, or somewhere else after the element is ready, e.g.:

$(function() {
  $('#AddToCart').attr('disabled', 'disabled');
});

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