//本文支持js在线工具测试、转载请注明出处。
<htmlxmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"/> <title>UntitledDocument</title> <script> function openDiv(newDivID) { var newMaskID = "mask"; //遮罩层id var newMaskWidth =document.body.scrollWidth;//遮罩层宽度 var newMaskHeight =document.body.scrollHeight;//遮罩层高度 //mask遮罩层 var newMask = document.createElement("div");//创建遮罩层 newMask.id = newMaskID;//设置遮罩层id newMask.style.position = "absolute";//遮罩层位置 newMask.style.zIndex = "1";//遮罩层zIndex newMask.style.width = newMaskWidth + "px";//设置遮罩层宽度 newMask.style.height = newMaskHeight + "px";//设置遮罩层高度 newMask.style.top = "0px";//设置遮罩层于上边距离 newMask.style.left = "0px";//设置遮罩层左边距离 newMask.style.background = "gray";//#33393C//遮罩层背景色 newMask.style.filter = "alpha(opacity=40)";//遮罩层透明度IE newMask.style.opacity = "0.40";//遮罩层透明度FF document.body.appendChild(newMask);//遮罩层添加到DOM中 window.open('http://www.baidu.com','_blank','width=500,height=260,menubar=no,toolbar=no'); //弹出子页面，具体自用自改 //弹出层滚动居中 function newDivCenter() { newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px"; newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px"; } if(document.all)//处理滚动事件，使弹出层始终居中 { window.attachEvent("onscroll",newDivCenter); } else { window.addEventListener('scroll',newDivCenter,false); } //关闭新图层和mask遮罩层 var newA = document.createElement("span"); newA.href = "#"; newA.style.position = "absolute";//span位置 newA.style.left=350+ "px"; newA.innerHTML = "Close"; newA.onclick = function()//处理关闭事件 { if(document.all) { window.detachEvent("onscroll",newDivCenter); } else { window.removeEventListener('scroll',newDivCenter,false); } document.body.removeChild(newMask);//移除遮罩层 document.body.removeChild(newDiv);////移除弹出框 return false; } newDiv.appendChild(newA);//添加关闭span } </script> </head> <BODY> <a onclick="openDiv('newDiv');" style="cursor:pointer">点我点我</a> <br> username:<input type="text" name="uname"/><br> u p w d:<input type="password" name="upwd"/> <br /><br /><br /><br /><br /><br /> <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> <br /><br /><br /><br /><br /><br /> <a onclick="openDiv('newDiv');" style="cursor:pointer">点我点我</a> </BODY> </html>出处：http://blog.csdn.net/xuexiaodong009/article/details/6605417
参考文档：http://blog.csdn.net/alex197963/article/details/4456174