怎么制作网页登陆浮动窗口界面？
如题！
[size=16px]比如在腾讯网的，我们要登陆的时候它就会弹出一个浮动的小窗口，那个效果怎么制作的，我觉得很好的，现在很多都用的这种，请高手解决下呗！小弟在此谢过！[/size]
[解决办法]
类似的代码网上很多的。
<!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><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>弹出层并可拖拽</title><style>html,body{height:100%;overflow:hidden;}body,div,h2{margin:0;padding:0;}body{font:12px/1.5 Tahoma;}center{padding-top:10px;}button{cursor:pointer;}#overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#000;opacity:0.5;filter:alpha(opacity=50);display:none;}#win{position:absolute;top:50%;left:50%;width:400px;height:200px;background:#fff;border:4px solid #f90;margin:-102px 0 0 -202px;display:none;}h2{font-size:12px;height:18px;text-align:right;background:#FC0;border-bottom:3px solid #f90;padding:5px;cursor:move;}h2 span{color:#f90;cursor:pointer;background:#fff;border:1px solid #f90;padding:0 2px;}</style><script>window.onload = function (){ var oWin = document.getElementById("win"); var oLay = document.getElementById("overlay"); var oBtn = document.getElementsByTagName("button")[0]; var oClose = document.getElementById("close"); var oH2 = oWin.getElementsByTagName("h2")[0]; var bDrag = false; var disX = disY = 0; oBtn.onclick = function () { oLay.style.display = "block"; oWin.style.display = "block" }; oClose.onclick = function () { oLay.style.display = "none"; oWin.style.display = "none" }; oClose.onmousedown = function (event) { (event || window.event).cancelBubble = true; }; oH2.onmousedown = function (event) { var event = event || window.event; bDrag = true; disX = event.clientX - oWin.offsetLeft; disY = event.clientY - oWin.offsetTop; this.setCapture && this.setCapture(); return false }; document.onmousemove = function (event) { if (!bDrag) return; var event = event || window.event; var iL = event.clientX - disX; var iT = event.clientY - disY; var maxL = document.documentElement.clientWidth - oWin.offsetWidth; var maxT = document.documentElement.clientHeight - oWin.offsetHeight; iL = iL < 0 ? 0 : iL; iL = iL > maxL ? maxL : iL; iT = iT < 0 ? 0 : iT; iT = iT > maxT ? maxT : iT; oWin.style.marginTop = oWin.style.marginLeft = 0; oWin.style.left = iL + "px"; oWin.style.top = iT + "px"; return false }; document.onmouseup = window.onblur = oH2.onlosecapture = function () { bDrag = false; oH2.releaseCapture && oH2.releaseCapture(); };};</script></head><body><div id="overlay"></div><div id="win"><h2><span id="close">×</span></h2></div><center><button>弹出层</button></center></body></html>