HTML CSS Javascript完成浮动登录窗口和窗口移动
【源码下载】（百度网盘）【源码下载】（爱问知识人）

@charset "utf-8";/* CSS Document */body{text-align:center;}#divParent{width:980px;}#div1{position:absolute;display:none;height:100px;width:250px;background-color:#9F9;border:outset #06C 1px;z-index:1001;border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-left-radius:3px;border-bottom-right-radius:3px;}#opacityDiv{display:none;z-index:100;position:absolute; /* Firefox 3.6 */  background-image: -moz-linear-gradient(top, #00F, #F00);  /* Safari & Chrome */  background-image: -webkit-gradient(linear,left bottom,left top,color-stop(0, #00F),color-stop(1, #F00));   /* IE6 & IE7 */  filter:  progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#00F', endColorstr='#F00');  /* IE8 */  -ms-filter: "progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#00F', endColorstr='#F00')"; }#cancle{margin-left:50px;}#close{text-align:right;height:15px;padding-right:1px;cursor:move;}#close span{cursor:default;}