我要做的是使用window.open创建一个新窗口,然后当新窗口打开时,我想检查该窗口是否在整个过程中都处于活动状态?例如:我有打开此窗口后,如果myNewWindow失去焦点,我想要递增变量increase的值。So, I'm really trying to check if the window was in fo
当整个浏览器窗口失去焦点时,我可以在userChrome.css中使用CSS选择器来改变火狐的文本颜色吗?我试过了:window:active element { color: #aaa; } /* only when something's being clicked */
window:hover element { color