背景图片链接

客户的一个网站，有两处背景图片需要链接，现在没办法做的是文字的链接，听说js能实现背景图片链接，请高手指教<table width="400" border="0" cellspacing="0" cellpadding="0">
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                      <td height="34" colspan="4">&nbsp;</td>
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                  <td width="200" align="center" valign="middle" style="background:url(images/rightbg3.jpg) no-repeat center;"><table width="180." border="0" cellspacing="0" cellpadding="0">
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                      <td class="font6" align="left"><font class="font7"><b>专业培训</b></font><br />
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