图像的位置不随窗口滚动而改变 [英] POsition of image not changing with window scroll

问题描述

当窗口向下滚动但什么都没发生时，我正在使用此代码将图像向下滑动

I am using this code to slide the image down when window is scroled down but nothing is happenning

$('#left_img').css("top",$(window).scrollTop()+"px");




#left_img {
margin:0 0 0 -55px !important;
position:absolute;
top:5px !important;
}

是否有可能找出整个滚动窗口的高度，然后如果图像达到一定高度，则应停止向下滑动

Is it possible to find out how much is height of whole scroll window and then if image reaches certain height then it should stop sliding down

推荐答案

您需要首先实际捕获事件.

You need to actually capture the event first.

$(window).scroll(function() { 
    $('#left_img').css("top", $(window).scrollTop()+"px");
});

我对滚动和定位了解不多，但是如果您不捕获事件，那可能是您的问题.

I don't know much about scrolling and positioning, but if you're not capturing the event, that could be you're problem.

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