<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> *{ margin: 0; padding: 0; } .nav{ width: 100%; height: 20px; background-color: #ccc; } .popup{ width: 300px; height: 300px; border: 1px solid red; position: absolute; left: 50%; top: 50%; margin-left: -150px; margin-top: -150px; } .popup .title{ height: 20px; width: 100%; background: deeppink; cursor: move; } </style> </head> <body> <div>注册信息</div> <div> <div>我是窗口标题，可拖着我走</div> <div>我是窗口内容</div> </div> <script> var popupfather = document.getElementById('popupfather'); var popupson = document.getElementById('popupson'); popupson.onmousedown = function(event){ var event = event || window.event; var that = this; var x = event.clientX - popupfather.offsetLeft - 150; //当前鼠标点击处相对于popupfather所在位置x ， -150 是处理margin值 var y = event.clientY - popupfather.offsetTop - 150; //当前鼠标点击处相对于popupfather所在位置y document.onmousemove = function(event){ var event = event || window.event; popupfather.style.left = event.clientX - x + "px"; popupfather.style.top = event.clientY- y + "px"; window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); } } document.onmouseup = function(){ document.onmousemove = null; } </script> </body> </html>
效果图：
