• JS各种各样的拖动效果


    <html>
    <head><title>拖动效果函数演示 by Longbill.cn</title>
    <style>
    body
    {
        font-size:12px;
        color:#333333;
        border : 0px solid blue;
    }
    div
    {
        position : absolute;
        background-color : #c3d9ff;
        margin : 0px;
        padding : 5px;
        border : 0px;
        width : 100px;
        height:100px;
    }
    </style>
    </head>
    <body>
    <script>
    function drag(o,s)
    {
        if (typeof o == "string") o = document.getElementById(o);
        o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
        o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
        o.orig_index = o.style.zIndex;
            
        o.onmousedown = function(a)
        {
            this.style.cursor = "move";
            this.style.zIndex = 10000;
            var d=document;
            if(!a)a=window.event;
            var x = a.clientX+d.body.scrollLeft-o.offsetLeft;
            var y = a.clientY+d.body.scrollTop-o.offsetTop;
            //author: www.longbill.cn
            d.ondragstart = "return false;"
            d.onselectstart = "return false;"
            d.onselect = "document.selection.empty();"
                    
            if(o.setCapture)
                o.setCapture();
            else if(window.captureEvents)
                window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);

            d.onmousemove = function(a)
            {
                if(!a)a=window.event;
                o.style.left = a.clientX+document.body.scrollLeft-x;
                o.style.top = a.clientY+document.body.scrollTop-y;
                o.orig_x = parseInt(o.style.left) - document.body.scrollLeft;
                o.orig_y = parseInt(o.style.top) - document.body.scrollTop;
            }

            d.onmouseup = function()
            {
                if(o.releaseCapture)
                    o.releaseCapture();
                else if(window.captureEvents)
                    window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
                d.onmousemove = null;
                d.onmouseup = null;
                d.ondragstart = null;
                d.onselectstart = null;
                d.onselect = null;
                o.style.cursor = "normal";
                o.style.zIndex = o.orig_index;
            }
        }
        
        if (s)
        {
            var orig_scroll = window.onscroll?window.onscroll:function (){};
            window.onscroll = function ()
            {
                orig_scroll();
                o.style.left = o.orig_x + document.body.scrollLeft;
                o.style.top = o.orig_y + document.body.scrollTop;
            }
        }
    }
    </script>

    <div id="div1" style="left:10px;top:10px;">div1:我可以被拖动</div>
    <div id="div2" style="left:120px;top:10px;background-color : #f3d9ff">div2:来拖我呀</div>
    <div id="div3" style="left:230px;top:10px;background-color : #c3ffff">div3:我随便你拖</div>
    <div id="div4" style="left:10px;top:120px;background-color : #c3d944">div4:我可以随窗口滑动,把我拖到最下面,然后滚动网页看看</div>
    <div id="div5" style="left:120px;top:120px;background-color : #f3d944">作者: Longbill
    <a href=http://www.longbill.cn target=_blank>www.longbill.cn</a>
    </div>
    <div id="div6" style="left:230px;top:120px;background-color : #e3f944;200px;">参数说明:

    drag(obj [,scroll]);

    obj:对象的id或对象本身;

    scroll(可选):对象是否随窗口拖动而滑动,默认为否

    鼠标右键查看源代码
    </div>


    <script>
    drag("div1");
    drag("div2");
    drag("div3");
    drag("div4",1);
    drag("div5",1);
    drag("div6",1);


    </script>

    </body>


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  • 原文地址:https://www.cnblogs.com/jcomet/p/1242797.html
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