<!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> <title>简单实用的可拖曳窗口</title> <meta http-equiv="content-type" content="text/html;charset=gb2312"> <script type="text/javascript" src="/ajaxjs/jquery-1.6.2.min.js"></script> <script type="text/javascript"> $(function(){ //样式 $("#drag").css({"position":"absolute","top":"100px","left":"100px","border":"1px solid #789","width":"150px","height":"90px","background":"#988f82","cursor":"move"}) /*+++++ 拖曳效果 ++++++ *原理：标记拖曳状态dragging，坐标位置iX、iY * mousedown:fn(){dragging = true：记录起始坐标位置，设置鼠标捕获} * mouseover:fn(){判断如果dragging = true，则当前坐标位置 - 记录起始坐标位置，绝对定位的元素获得差值} * mouseup:fn(){dragging = false：释放鼠标捕获，防止冒泡} */ var dragging = false; var iX, iY; $("#drag").mousedown(function(e) { dragging = true; iX = e.clientX - this.offsetLeft; iY = e.clientY - this.offsetTop; this.setCapture && this.setCapture(); return false; }); document.onmousemove = function(e) { if (dragging) { var e = e || window.event; var oX = e.clientX - iX; var oY = e.clientY - iY; $("#drag").css({"left":oX + "px", "top":oY + "px"}); return false; } }; $(document).mouseup(function(e) { dragging = false; $("#drag")[0].releaseCapture(); e.cancelBubble = true; }) }) </script> </head> <body> <div id="drag"></div> </body> </html>