css help icon
<style>
.help_icon{
width:16px;
height:16px;
line-height:16px;
text-align:center;
display:inline-block;
border-radius:100%;
font-size:14px;
text-decoration:none;
-webkit-box-shadow: inset -1px -1px 1px 0px rgba(0,0,0,0.4);
-moz-box-shadow: inset -1px -1px 1px 0px rgba(0,0,0,0.4);
box-shadow: inset -1px -1px 1px 0px rgba(0,0,0,0.4);
color:#000;
background-color:#f2cd5c;
}
</style>
<a class="help_icon">?</a>