You can achieve the desired outcome using the following steps:
HTML
<fieldset>
<legend>Container Heading</legend>
<button id="visit_return_button" type="submit">Button1</button>
<button id="visit_return_button" type="submit">Button2</button>
</fieldset>
CSS
fieldset {
border:1px solid;
width:200px;
height:70px;
display:table-cell;
vertical-align:middle;
text-align:center;
}
legend {
margin-left:5px;
}
#visit_return_button{
background-color:#9C8C42;
border: 2px solid #91782c;
color: #FFF;
text-align: center;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
padding: 10px;
}
Alternatively, you can view the demonstration here: http://jsfiddle.net/VY8xs/21/