请教:鼠标放上去显示某一栏代码如何写呢?
象sina,163等网站首页的效果:例如sina首页导航下面左上角,鼠标放上去可以轮换显示,并可从数据库中读出数据的效果是怎么做的啊?希望能得到高手指教~~
------解决方案-------------------- <TABLE cellSpacing=4 cellPadding=0 width= "100% " border=0>  
    <TBODY>  
    <TR>  
      <TD align=left height=151>  
        <TABLE class=solid-bottom cellSpacing=0 cellPadding=0 width=400  
         border=0>  <TBODY>  
          <TR>  
            <TD width=383 height=19>  
              <TABLE id=secTable cellSpacing=0 cellPadding=0 border=0>  
                <TBODY>  
                <TR>  
                  <TD class=sec2 onmouseover=secBoard(0) align=middle  
                   width=70> 测试1 </TD>  
                  <TD class=sec1 onmouseover=secBoard(1) align=middle  
                   width=120> 测试2 </TD>  
                  <TD class=sec1 onmouseover=secBoard(2) align=middle  
                   width=110> 测试3 </TD>  </TR>  </TBODY>  </TABLE>  </TD>  
            <TD width=17>  
              <SCRIPT language=JavaScript type=text/javascript>  
 function  secBoard(n) 
 { 
 for(i=0;i <secTable.cells.length;i++) 
 secTable.cells[i].className= "sec1 "; 
 secTable.cells[n].className= "sec2 "; 
 for(i=0;i <mainTable.tBodies.length;i++) 
 mainTable.tBodies[i].style.display= "none "; 
 mainTable.tBodies[n].style.display= "block "; 
 } 
                </SCRIPT>  
            </TD>  </TR>  </TBODY>  </TABLE>  
        <TABLE id=mainTable height=120 cellSpacing=5 cellPadding=0 width=400  
       border=0>  
          <TBODY style= "DISPLAY: block ">  
          <TR>  
            <TD height=120>  
              <TABLE cellSpacing=0 cellPadding=0 width= "100% " border=0>  
                <TBODY>  
                <TR>  
                  <TD height=72> 测试1 </TD>  </TR>  
                <TR>  
                  <TD align=right height=22> 测试1 </TD>  </TR>  </TBODY>  </TABLE>  </TD>  </TR>  </TBODY>  
          <TBODY style= "DISPLAY: none ">  
          <TR>  
            <TD height=120>  
              <TABLE cellSpacing=0 cellPadding=0 width= "100% " border=0>  
                <TBODY>  
                <TR>  
                  <TD height=72> 测试2 </TD>  </TR>  
                <TR>  
                  <TD align=right height=22> 测试2 </TD>  </TR>  </TBODY>  </TABLE>  </TD>  </TR>  </TBODY>  
          <TBODY style= "DISPLAY: none ">  
          <TR>  
            <TD height=120>  
              <TABLE cellSpacing=0 cellPadding=0 width= "100% " border=0>  
                <TBODY>  
                <TR>  
                  <TD height=72> 测试3 </TD>  </TR>  
                <TR>  
                  <TD align=right height=22> 测试3 </TD>  </TR>  </TBODY>  </TABLE>  </TD>  </TR>  </TBODY>  
          <TBODY style= "DISPLAY: none ">  </TBODY>  </TABLE>  </TD>  </TR>  </TBODY>  </TABLE>
------解决方案--------------------前段时间刚写过一个     
  <html>  
  <head>  
  <meta http-equiv= "Content-Type " content= "text/html; charset