如何将表格中得某一行中得字体动态得显示颜色?
当表格中某一行中得数据满足某个条件后,我想让它得字体颜色也改变,比如说变成红色. 
 原先得语句是: <td   >  <c:out   value= "${item.valueN} "/>  </td>  
    当表格中该行得数据被我编辑改变以后,我想让它得颜色也相应改变.请问这个怎么写啊?请高手赐教!
------解决方案--------------------条件写出来,加上 <td style= "color:red ">  <c:out value= "${item.valueN} "/>  </td>
------解决方案--------------------定义两个class,通过事件动态修改class
------解决方案--------------------通过js去判断然后修改你的css样式就可以了; 
 问题不完整,只能这么说了
------解决方案--------------------简单实现,L@_@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> alarm color </title>  
    <meta name= "generator " content= "editplus " />  
    <meta name= "author " content= "yixianggao " />  
    <meta name= "keywords " content= "javascript " />  
    <meta name= "description " content= "for csdn javascript region " />  
   </head>    
   <body>  
    <table id= "tabTarget " cellpadding= "0 " cellspacing= "0 " border= "1 ">  
      <tr>  
          <th> 姓名 </th>  
          <th> 年龄 </th>  
      </tr>  
      <tr>  
          <td> 张三 </td>  
          <td>  <input type= "text " />  </td>  
      </tr>  
      <tr>  
          <td> 李四 </td>  
          <td>  <input type= "text " />  </td>  
      </tr>  
    </table>  
   </body>  
   <script type= "text/javascript ">  
   <!-- 
 var oTable = document.getElementById( "tabTarget "); 
 var targetColumnIndex = 1; 
 var ageLimit = 18; 
 var currentRow; 
 var targetElement; 
 var validColor =  "#00ff00 " 
 var invalidColor =  "#ff0000 "   
 for (var i=1; i <oTable.rows.length; i++) 
 { 
     currentRow = oTable.rows[i]; 
     targetElement = currentRow.cells[targetColumnIndex].firstChild; 
     targetElement.onchange = function() 
     { 
         if (parseInt(this.value) != NaN && parseInt(this.value) > = ageLimit) 
         { 
             this.parentNode.parentNode.style.backgroundColor = validColor; 
         } 
         else 
         { 
             this.parentNode.parentNode.style.backgroundColor = invalidColor; 
         } 
     }; 
 } 
  //-->  
   </script>  
  </html>  
------解决方案--------------------onMouseOver= "this.style.backgroundColor= '#ECF5FF ' " onMouseOut= "this.style.backgroundColor= '#fff ' "