If you were to place the css inline it would look like:
<label>
Security<span class="style2">: </span><img style="margin-left:30px" id="capt1" src="webassist/captcha/wavt_captchasecurityimages.php?width=200&height=50 &field=Security_Code_1&bgcolor=EAEFF5&transparent= 0&bgimage=&gridfreq=20&gridcolor=000000&gridorder= behind&noisefreq=10&noisecolor=000000&noiseorder=b ehind&characters=5&charheight=&font=fonts/MODERNA_.TTF&textcolor=000000" alt="security code" width="200" height="50" /><img src="webassist/captcha/images/refresh.png" height="18" onclick="document.getElementById('capt1').src+='&r ef=1'" />
<br />
<input style="margin-left:90px" id="Security_Code_1" name="Security_Code_1" type="text" size="30" value="" />
</label>