当鼠标悬停在另一个 Div 上时为一个 Div 设置动画

I'm looking to animate one div when the mouse hovers over another div tag elsewhere on the page. As an example...

CSS

#blue-box {
position:absolute;
margin-left:50px;
margin-top:50px;
height:100px;
width:100px;
background-color:blue;

}

#red-box {
position:absolute;
margin-left:180px;
margin-top:50px;
height:100px;
width:100px;
background-color:red;

}

HTML

<div id="blue-box"></div>
<div id="red-box"></div>

JavaScript

$(document).ready(function(){
    $('#red-box').animate({'margin-top': '200px'}, 1500);
});

I've also made a jsFiddle to help.

How would I get the animation to trigger on the red box, whenever the mouse hovers over the blue box? And reverse the animation when the mouse is moved away from the blue box? Returning the red box to it's starting position.

Could anyone help me?

解决方案

This should do the trick:

$(document).ready(function(){
    $("#blue-box").hover(function(){
        $('#red-box').stop().animate({'margin-top': '200px'}, 1500);
    }, function(){
        $('#red-box').stop().animate({'margin-top': '50px'}, 1500);
    });
});

It should be noted that this can be done easier with CSS, in case the DOM order of the elements are given, but that solution is not flexible if we separate the DOM elements.