日期:2014-05-16  浏览次数:20439 次

问一个点击问题
怎样实现这样的点击效果:
以下是百度网页搜索代码:
HTML code
<table>
  <tr align="center">
    <td bgcolor="#00FFFF"><a href="javascript:">网页</a></td>
    <td><a href="javascript:">音乐</a></td>
  </tr>
  <tr>
    <td colspan="2">
    <form action="http://www.baidu.com/s" target="_blank">
      <input name="word" type="text" value="" />
      <input type="submit" value="百度一下" />
    </form></td>
  </tr>
</table>

怎样实现点击“音乐”链接后,单元格改变颜色,搜索代码改为音乐搜索?效果:
HTML code
<table>
  <tr align="center">
    <td><a href="javascript:">网页</a></td>
    <td bgcolor="#00FFFF"><a href="javascript:">音乐</a></td>
  </tr>
  <tr>
    <td colspan="2">
    <form action="http://mp3.baidu.com/m" target="_blank">
    <input name="word" type="text" value="">
    <input type="submit" value="百度一下">
</form></td>
  </tr>
</table>


------解决方案--------------------
HTML code
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript">
window.onload = function() {
    var tr1 = document.getElementsByTagName('table')[0].getElementsByTagName('tr')[0];
    var f = document.getElementsByTagName('table')[0].getElementsByTagName('form')[0];
    tr1.getElementsByTagName('td')[0].onclick = function() {
        this.style.backgroundColor = '#0FF';
        tr1.getElementsByTagName('td')[1].style.backgroundColor = '#FFF';
        f.action = 'http://www.baidu.com/s';
    }
    tr1.getElementsByTagName('td')[1].onclick = function() {
        this.style.backgroundColor = '#0FF';
        tr1.getElementsByTagName('td')[0].style.backgroundColor = '#FFF';
        f.action = 'http://mp3.baidu.com/m';
    }
}
</script>
</head>

<body>
<table>
  <tr align="center">
    <td style="background-color:#0FF"><a href="javascript:">网页</a></td>
    <td><a href="javascript:">音乐</a></td>
  </tr>
  <tr>
    <td colspan="2">
    <form action="http://www.baidu.com/s" target="_blank">
      <input name="word" type="text" value="" />
      <input type="submit" value="百度一下" />
    </form></td>
  </tr>
</table>
</body>
</html>

------解决方案--------------------
HTML code

<script>
function doit(n){
    var tbl = document.body.getElementsByTagName("table")[0];
    for(var i=0;i<tbl.rows[0].cells.length;i++) tbl.rows[0].cells[i].style.background = "#FFF";
    switch(n){
        case 0:
            tbl.rows[0].cells[0].style.background = "#0FF";
            document.forms[0].action = "http://www.baidu.com/s";
            break;
        case 1:
            tbl.rows[0].cells[1].style.