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  • div随意拖动小例子

    <html>  
    <head>  
    <title> Drag Demo 1 </title>  
    <style type="text/css">  
    #drag{  
        100px;  
        height:20px;  
        background-color:#eee;  
        border:1px solid #333;  
        position:absolute;  
        top:30px;  
        left:200px;  
        text-align:center;  
        cursor:default;  
        }  
    </style>  
    <script type="text/javascript">  
    window.onload=function(){  
        drag(document.getElementById('drag'));  
    };  
      
    function drag(o){  
        o.onmousedown=function(a){  
            var d=document;if(!a)a=window.event;  
            var x=a.layerX?a.layerX:a.offsetX,y=a.layerY?a.layerY:a.offsetY;  
            if(o.setCapture)  
                o.setCapture();  
            else if(window.captureEvents)  
                window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);  
      
            d.onmousemove=function(a){  
                if(!a)a=window.event;  
                if(!a.pageX)a.pageX=a.clientX;  
                if(!a.pageY)a.pageY=a.clientY;  
                var tx=a.pageX-x,ty=a.pageY-y;  
                o.style.left=tx;  
                o.style.top=ty;  
            };  
      
            d.onmouseup=function(){  
                if(o.releaseCapture)  
                    o.releaseCapture();  
                else if(window.captureEvents)  
                    window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);  
                d.onmousemove=null;  
                d.onmouseup=null;  
            };  
        };  
    }  
    </script>  
    </head>  
      
    <body>  
    <div id="drag">drag me<div>  
    </body>  
    </html>  
    

      

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  • 原文地址:https://www.cnblogs.com/lansy/p/6136895.html
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