可以随鼠标拖拽的div

时间：2022-11-13 14:02:04

可以拖拽的div

<!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>

<style>

#div1 {width:100px; height:100px; background:red; position:absolute;}

</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>可以拖拽的div</title>

<script>

window.onload=function ()

{

    var oDiv=document.getElementById('div1');

    var disX=0;

    var disY=0;

    oDiv.onmousedown=function (ev)

    {

        var oEvent=ev||event;

        disX=oEvent.clientX-oDiv.offsetLeft;

        disY=oEvent.clientY-oDiv.offsetTop;

        document.onmousemove=function (ev)

        {

            var oEvent=ev||event;

            var l=oEvent.clientX-disX;

            var t=oEvent.clientY-disY;

            if(l<0)

            {

                l=0;

            }

            else if(l>document.documentElement.clientWidth-oDiv.offsetWidth)

            {

                l=document.documentElement.clientWidth-oDiv.offsetWidth;

            }

            if(t<0)

            {

                t=0;

            }

            else if(t>document.documentElement.clientHeight-oDiv.offsetHeight)

            {

                t=document.documentElement.clientHeight-oDiv.offsetHeight;

            }

            oDiv.style.left=l+'px';

            oDiv.style.top=t+'px';

        };

        document.onmouseup=function ()

        {

            document.onmousemove=null;

            document.onmouseup=null;

        };

        return false;

    };

};

</script>

</head>

<body>

<div id="div1"></div>

</body>

</html>

相关文章