CSS3 in standard WebHelp

RH10 | WebHelp

Does anyone know if it's possible to render CSS3 in the standard WebHelp output, not the Multiscreen output? For example, I use the following CSS to create a button with round corners, but when viewed in IE the round corners don't display. However, in Firefox they display fine.

.btn-primary-action {

background-color: #eeaf00;

  -webkit-border-top-left-radius: 6px;

  -moz-border-radius-topleft: 6px;

border-top-left-radius: 6px;

  -webkit-border-top-right-radius: 6px;

  -moz-border-radius-topright: 6px;

border-top-right-radius: 6px;

  -webkit-border-bottom-right-radius: 6px;

  -moz-border-radius-bottomright: 6px;

border-bottom-right-radius: 6px;

  -webkit-border-bottom-left-radius: 6px;

  -moz-border-radius-bottomleft: 6px;

border-bottom-left-radius: 6px;

text-indent: 0px;

display: inline-block;

color: #ffffff;

font-size: 16px;

height: 47px;

line-height: 47px;

width: 193px;

text-align: center;

text-decoration: none;

margin:20px 6px 0 0;

}

Thanks

Jonathan