求板块交换的js代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>test</title> 
</head> 
<style> 
body {background-color: #fff; font-size:14px; color:#666;} 
#link-url a {display:block; height:30px; line-height:30px;width:100px; color:#666; text-decoration:none;cursor:pointer;}  
#link-url a:hover {background:#ccc;} 
#d-k{position:relative; margin:0px 0px 0px 0px;z-index:0;} 
#Layer1,#Layer2,#Layer3,#Layer4,#Layer5{position:absolute; left: 70px; top: 0px;right:70px;} 
#show-k{margin:0px 0px 0px 0px;position:relative;background-color:#000; border:#ccc 1px solid; height:100px;z-index:3;filter:alpha(opacity=70);opacity:0.7; width:500px;} 
</style> 
<script language="javascript"> 
function change(x) {document.getElementById(x).style.display ="none";} 
function onClickbox(y){document.getElementById(y).style.display ="";} 
function onMouseOutbox(z){document.getElementById(z).style.display ="none";} 
function onMouseOverbox(a){document.getElementById(a).style.display ="";} 
</script> 
<body> 
<div id="link-url" > 
  <table width="400" cellspacing="5"> 
    <tr> 
      <td> 
        <div id="d-k"> 
            <a onclick="onClickbox('Layer1');" onMouseOut="onMouseOutbox('Layer1')">我点击一</a> 
            <div id="Layer1" style="display:none;" onMouseOver="onMouseOverbox('Layer1')" onMouseOut="onMouseOutbox('Layer1')"> 
                <div id="show-k">  
                    <table width="100%" border="0" cellpadding="0" cellspacing="0"> 
                      <tr> 
                        <td>1sty人的和lesdf人的和人的和11</td> 
                        <td>人的和人的和人的和人的和人的和</td> 
                        <td>33人的和人的和人的和人的和3</td> 
                        <td>44人的和人的和人的和人的和人的和人的和人的和人的和4</td> 
                      </tr> 
                    </table> 
                </div> 
            </div> 
        </div> 
    </td> 
    </tr> 
    <tr> 
      <td> 
        <div id="d-k"> 
            <a onClick="onClickbox('Layer2')" onMouseOut="onMouseOutbox('Layer2')">我点击一</a> 
            <div id="Layer2" style="display:none;" onMouseOver="onMouseOverbox('Layer2')" onMouseOut="onMouseOutbox('Layer2')"> 
                <div id="show-k">  
                    <table width="100%" border="0" cellpadding="0" cellspacing="0"> 
                      <tr> 
                        <td><a href="#" onClick="change('Layer2')">111</a></td> 
                        <td><a href="#" onClick="change('Layer2')">222</a></td> 
                        <td><a href="#" onClick="change('Layer2')">333</a></td> 
                        <td><a href="#" onClick="change('Layer2')">444</a></td> 
                      </tr> 
                    </table> 
                </div> 
            </div> 
        </div> 
      </td> 
    </tr> 
    <tr> 
      <td> 
        <div id="d-k"> 
            <a onClick="onClickbox('Layer3')" onMouseOut="onMouseOutbox('Layer3')">我点击一</a> 
            <div id="Layer3" style="display:none;" onMouseOver="onMouseOverbox('Layer3')" onMouseOut="onMouseOutbox('Layer3')"> 
                <div id="show-k">  
                    <table width="100%" border="0" cellpadding="0" cellspacing="0"> 
                      <tr> 
                        <td><a href="#" onClick="change('Layer3')">111</a></td> 
                        <td><a href="#" onClick="change('Layer3')">222</a></td> 
                        <td><a href="#" onClick="change('Layer3')">333</a></td> 
                        <td><a href="#" onClick="change('Layer3')">444</a></td> 
                      </tr> 
                    </table> 
                </div> 
            </div> 
        </div> 
      </td> 
    </tr> 
    <tr> 
      <td> 
        <div id="d-k"> 
        <a onClick="onClickbox('Layer4')" onMouseOut="onMouseOutbox('Layer4')">我点击一</a> 
            <div id="Layer4" style="display:none;" onMouseOver="onMouseOverbox('Layer4')" onMouseOut="onMouseOutbox('Layer4')"> 
                <div id="show-k">  
                    <table width="100%" border="0" cellpadding="0" cellspacing="0"> 
                      <tr> 
                        <td><a href="#" onClick="change('Layer4')">111</a></td> 
                        <td><a href="#" onClick="change('Layer4')">222</a></td> 
                        <td><a href="#" onClick="change('Layer4')">333</a></td> 
                        <td><a href="#" onClick="change('Layer4')">444</a></td> 
                      </tr> 
                    </table> 
                </div> 
            </div> 
        </div> 
      </td> 
    </tr> 
    <tr> 
      <td> 
        <div id="d-k"> 
            <a onClick="onClickbox('Layer5')" onMouseOut="onMouseOutbox('Layer5')">我点击一</a> 
            <div id="Layer5" style="display:none;" onMouseOver="onMouseOverbox('Layer5')" onMouseOut="onMouseOutbox('Layer5')"> 
                <div id="show-k">  
                    <table width="100%" border="0" cellpadding="0" cellspacing="0"> 
                      <tr> 
                        <td><a href="#" onClick="change('Layer5')">111</a></td> 
                        <td><a href="#" onClick="change('Layer5')">222</a></td> 
                        <td><a href="#" onClick="change('Layer5')">333</a></td> 
                        <td><a href="#" onClick="change('Layer5')">444</a></td> 
                      </tr> 
                    </table>  
                </div> 
            </div> 
        </div> 
      </td> 
    </tr> 
  </table> 
</div> 
</div> 
</body> 
</html>