Question

如何用js实现点击按钮改变表格中的一个单元格的背景颜色

Answer 1

<script language="javascript" type="text/javascript">
function chgbg(id){
var obj=window.document.getElementById(id);
var bg=obj.style.backgroundColor;
if(bg=='') obj.style.backgroundColor='#f00'
else obj.style.backgroundColor=''
}
</script>
<table width="100%" border="1" cellspacing="0" cellpadding="4">
<tr>
<td id="td1"> </td>
<td id="td2"> </td>
<td id="td3"> </td>
</tr>
<tr>
<td id="td4"> </td>
<td id="td5"> </td>
<td id="td6"> </td>
</tr>
</table>
<input type="button" value="点击改变指定单元格背景" onClick="chgbg('td1');" />