<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> <script src="jquery-2.1.3.min.js"></script> </head> <script> function showDiv() { var Idiv = document.getElementById("Idiv"); var mou_head = document.getElementById('mou_head'); Idiv.style.display = "block"; //以下部分要将弹出层居中显示 Idiv.style.left=(document.documentElement.clientWidth-Idiv.clientWidth)/2+document.documentElement.scrollLeft+"px"; Idiv.style.top =(document.documentElement.clientHeight-Idiv.clientHeight)/2+document.documentElement.scrollTop-50+"px"; //以下部分使整个页面至灰不可点击 var procbg = document.createElement("div"); //首先创建一个div procbg.setAttribute("id","mybg"); //定义该div的id procbg.style.background = "#000000"; procbg.style.width = "100%"; procbg.style.height = "100%"; procbg.style.position = "fixed"; procbg.style.top = "0"; procbg.style.left = "0"; procbg.style.zIndex = "500"; procbg.style.opacity = "0.6"; procbg.style.filter = "Alpha(opacity=70)"; //背景层加入页面 document.body.appendChild(procbg); document.body.style.overflow = "hidden"; //取消滚动条 //以下部分实现弹出层的拖拽效果 var posX; var posY; mou_head.onmousedown=function(e) { if(!e) e = window.event; //IE posX = e.clientX - parseInt(Idiv.style.left); posY = e.clientY - parseInt(Idiv.style.top); document.onmousemove = mousemove; } document.onmouseup = function() { document.onmousemove = null; } function mousemove(ev) { if(ev==null) ev = window.event;//IE Idiv.style.left = (ev.clientX - posX) + "px"; Idiv.style.top = (ev.clientY - posY) + "px"; } } function closeDiv() //关闭弹出层 { var Idiv=document.getElementById("Idiv"); Idiv.style.display="none"; document.body.style.overflow = "auto"; //恢复页面滚动条 var body = document.getElementsByTagName("body"); var mybg = document.getElementById("mybg"); body[0].removeChild(mybg); } </script> <body> <input type="button" onClick="showDiv()" value="这里调用开打一个新的DIV"> <div id="Idiv" style="display:none; position:absolute; z-index:1000; background:#67a3d9;"> <input type="button" value="关闭" onclick="closeDiv();" /> <div id="mou_head" style="100px; height=10px;z-index:1001; position:absolute;">这个是用来实现拖层</div> </div> </body> </html>