js运动框架及应用 

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
    #div1 {width:200px; height:200px; background:red; position:absolute; top:50px; left:0px;}
    </style>
<script>
    var timer=null;
    function startMove()
    {
        var oDiv=document.getElementById('div1');
        clearInterval(timer);
        timer=setInterval(function () {
            var speed=1;
            if(oDiv.offsetLeft>=300)
                {
                    clearInterval(timer);
                }
            else
                {
                    oDiv.style.left=oDiv.offsetLeft+speed +'px';
        
                }
            }, 30);
            
    }
    </script>
</head>

<body>
<input id="btn1" type="button" value="开始运动" onclick="startMove()"/>
<div id="div1">
    
</div>
</body>
</html>

 

posted @ 2020-02-09 22:54  八风不动  阅读(133)  评论(0)    收藏  举报