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<!DOCTYPE HTML>
<html>
<head>
<meta charset="gb2312" />
<title></title>
<style>
* {
margin:0; padding:0; font-size:14px;
}
table {
margin:100px;
}
td {
width:200px; height:30px; line-height:30px;
border:1px solid blue;
}
input {
width:200px; height:30px; line-height:30px;
border:0;
}
</style>
</head>
<body>
<table>
<tr>
<td><input value="1-1" /></td>
<td><input value="1-2" /></td>
</tr>
<tr>
<td><input value="2-1" /></td>
<td><input value="2-2" /></td>
</tr>
</table>
<script>
function $(el){
return typeof el == 'string' ? document.getElementById(el) : el;
}
function $t(name, cot){
cot = cot || document;
return cot.getElementsByTagName(name);
}
var arr = $t('input');
for(var i = 0, len = arr.length; i < len; i++){
arr[i].onfocus = function(){
this.style.border = '1px solid red';
this.parentNode.style.border = '0';
}
arr[i].onblur = function(){
this.style.border = 'none';
this.parentNode.style.border = '1px solid blue';
}
}
</script>
</body>
</html>