我无法弄清楚如何将[X]按钮放到我的自定义CSS框的右上角.
这是迄今为止的结果:

#wrapper {
height: 100px;
width: 500px;
}
#wrapper {
bottom: 50%;
right: 50%;
position: absolute;
}
#container {
background: #FFF;
left: 50%;
padding: 10px;
top: 50%;
margin: 0;
padding: 0;
height: 100%;
border: 1px solid rgb(128, 128, 128);
height: 100%;
position: relative;
}
#inner1 {
height: 100%;
border: 1px solid blue;
}
#inner2 {
height: 100%;
border: 1px solid green;
}
#titlebar {
cursor: pointer;
height: 23px;
width: 100%;
filter: progid:DXImageTransform.Microsoft.gradient(startColorStr=#0A246A, endColorStr=#A6CAF0, GradientType=1);
color: white;
font: 13px arial, …Run Code Online (Sandbox Code Playgroud)