js小效果之跟随鼠标移动的小球


<!DOCTYPE html>
<html>
<head>
    <title>follow mouse</title>
</head>
<style type="text/css">
    *{
        margin: 0;
        padding:0;
    }
    #div1{width: 50px;height: 50px;background: red;color:#fff;text-align: center;line-height: 50px; position: absolute;transition: all 0.5s; }
    #div2{width: 50px;height: 50px;background: green;color:#fff;text-align: center;line-height: 50px;position:
    absolute;transition: all 0.5s; }

    .box1{
        width: 400px;
        height: 400px;
        border: 1px solid #ccc;
    }
    .box2{
        width: 400px;
        height: 400px;
        border: 1px solid #ccc;
        }
</style>

<body>
    <div class="box1" οnmοusemοve="b1()">
        <div id="div1" >1</div>
    </div>
    <div class="box2" οnmοusemοve="b2()">
        <div id="div2">2</div>
    </div>
</body>
<script type="text/javascript">
    function b1(ev) {
        var oEvent = ev || event;
        var oDiv = document.getElementById('div1');
        if( oEvent.clientX<350&&oEvent.clientY<350){
        oDiv.style.left = oEvent.clientX + 'px';
        oDiv.style.top = oEvent.clientY + 'px';
        }

    }
   function b2(ev){
        var oEvent=ev||event;
        var oDiv=document.getElementById('div2');
        if( oEvent.clientX<350&&oEvent.clientY<750){
           oDiv.style.left=oEvent.clientX+'px';
           oDiv.style.top=oEvent.clientY+'px';
        }
    }
</script>
</html>

 




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