跨行业问两个关于表格的问题

妥了，SFL@_@K<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title> new document </title>
  <meta name="generator" content="editplus" />
  <meta name="author" content="[email protected]" />
  <meta name="keywords" content="javascript" />
  <meta name="description" content="for javascript region of csdn" />
 </head> <body>
  <table border="1" cellpadding="0">
    <tr>
        <td id="tdShow" width="50" height="50" valign="top" style="word-break: break-all;background-color:#ffff99">1.1</td>
        <td width="50" height="50" valign="top">1.2</td>
    </tr>
    <tr>
        <td width="50" height="50" valign="top">2.1</td>
        <td width="50" height="50" valign="top">2.2</td>
    </tr>
  </table>
  <textarea id="taaInput" rows="15" cols="70">Input</textarea>  <script type="text/javascript">
  <!--
var oInput = document.getElementById("taaInput");
var oOutput = document.getElementById("tdShow");
var oShow = document.getElementById("btnShow");oInput.onkeydown = function() {
    oOutput.innerHTML = this.value;
};
oOutput.onpropertychange = function() {
    if (this.clientHeight > parseInt(this.height))
    {
        var s = "Alert: over flow!\n";
        s += "Original heigth: " + this.height + "\n";
        s += "Current heigth: " + this.clientHeight + "\n";
        alert(s);
    }
};
  //-->
  </script>
 </body>
</html>