<style>
tr.highlight{background:#08246B;color:white;}
</style>
<table border="1" width="70%" id="ice">
<tr>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
</tr>
<tr>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
</tr>
<tr>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
</tr>
<tr>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
</tr>
<tr>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
<td><input type='text'></td>
</tr>
</table>
<script language="javascript">
<!--
//定义初始化行列
var currentLine=-1;
var currentCol=-1;
document.onkeydown=function(e){
e=window.event||e;
switch(e.keyCode){
case 37: //左键
currentCol--;
changeItem();
break;
case 38: //向上键
currentLine--;
changeItem();
break;
case 39: //右键
currentCol++;
changeItem();
break;
case 40: //向下键
currentLine++;
changeItem();
break;
default:
break;
}
}
//方向键调用
function changeItem(){
if(document.all)
var it=document.getElementByIdx_x("ice").children[0];
else
var it=document.getElementByIdx_x("ice");
for(i=0;i<it.rows.length;i++){
it.rows[i].className="";
}
if(currentLine<0){
currentLine=it.rows.length-1;
}
if(currentLine==it.rows.length){
currentLine=0;
}
var objtab=document.all.ice;
var objrow=objtab.rows[currentLine].getElementsByTagName_r("INPUT");
if(currentCol<0){
currentCol=objrow.length-1;
}else if(currentCol==objrow.length){
currentCol=0;
}
objrow[currentCol].select();
//调试使用
it.rows[currentLine].className="highlight";
}
//-->
</script>本回答被提问者采纳