分享一个简单的拖拽

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
#box{width:100px;height:100px;background:red;text-align:center;line-height:100px;color:#fff;position:absolute;left:0;top:0;}
</style>
<script>
window.onload = function (){
    var oBox = document.getElementById('box');
    
    var disX = 0;
    var disY = 0;
    
    oBox.onmousedown = function ( ev ){
        var ev = ev || window.event;
        
        disX = ev.clientX - this.offsetLeft;
        disY = ev.clientY - this.offsetTop;
        
        document.onmousemove = function ( ev ){
            var ev = ev || window.event;
            
            oBox.style.left = ev.clientX - disX + 'px';
            oBox.style.top = ev.clientY - disY + 'px';
            
            ev.preventDefault && ev.preventDefault();
            return false;
        }
        
        document.onmouseup = function (){
            this.onmousemove = this.onmouseup = null;    
        }
    }
}
</script>
</head>

<body>
其他文字<br />
其他文字<br />
其他文字<br />
其他文字<br />
其他文字<br />
<div id="box">拖拽</div>
</body>
</html>

 

posted @ 2016-11-09 11:51  Lieber-l  阅读(153)  评论(0编辑  收藏  举报