html单击关闭div弹窗,js实现div弹框和关闭

JS弹出可拖拽可关闭的div层

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;}

#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;}

window.onload = function ()

{

var oWin = document.getElementById("win");

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 ()

{

oWin.style.display = "block"

};

oClose.onclick = function ()

{

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();

};

};

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