hi
i have problem with css and accordion when i change the color of accordion head at css the accordion become very slow when close and open it i do not know what is the problem this is the part of css code that belong to accordion header

.accordionHeader
{
border: 1px solid #2F4F4F;
color: #d2b48c;
background-color: #50a3be;
font-family: Arial, Sans-Serif;
font-size: 14px;
font-weight: bold;
padding: 5px;
margin-top: 5px;
cursor: pointer;
vertical-align: middle;
text-align: center;
background-image: url(images/edge2.gif);
}

.accordionContent
{
background-color: #fafafa;
border: 1px dashed #2F4F4F;
border-top: none;
padding: 5px;
padding-top: 10px;
}

.accordionLink
{
vertical-align: middle;
text-align: center;
}

AND THIS PART FROM ASPX FILE :

<td align="right" valign="middle" width="100%" colspan="4">
<cc1:Accordion ID="Accordion1" runat="server" SelectedIndex="0"
HeaderCssClass="accordionHeader"
ContentCssClass="accordionContent"
FadeTransitions="false"
FramesPerSecond="40"
TransitionDuration="150"
AutoSize="None"
Width = "100%">




plz any one can helpe

Best Regards