html
<input id="btnshow" type="button" value="Show" onclick="showdiv();">
<div id="bg"></div>
<div id="show">測試
<input id="btnclose" type="button" value="Close" onclick="hidediv();">
</div>
css
#bg {
display:none;
position:absolute;
top:0%;
left:0%;
width:100%;
height:100%;
background-color:black;
z-index:1001;
-moz-opacity:0.7;
opacity:.70;
filter:alpha(opacity=70);
}
#show {
display:none;
position:absolute;
top:25%;
left:22%;
width:53%;
height:49%;
padding:8px;
border:8px solid #E8E9F7;
background-color:white;
z-index:1002;
overflow:auto;
}
js
function showdiv() {
document.getElementById("bg").style.display = "block";
document.getElementById("show").style.display = "block";
}
function hidediv() {
document.getElementById("bg").style.display = 'none';
document.getElementById("show").style.display = 'none';
}