Js弹出层,可拖拽,可关闭
<!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>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>