Test with the HTML box

This is the code that made this HTML trick(must be added into the template)

pre
{
background:#efefef;
border:1px solid #A6B0BF;
font-size:120%;
line-height:100%;
overflow:auto;
padding:10px;
color:#000000 }
pre:hover {
border:1px solid #efefef;
}
code {
font-size:120%;
text-align:left;
margin:0;padding:0;
color: #000000;}
.clear { clear:both;
overflow:hidden;
}