急急，在线等

<input name="sch" type="text" id="sch" class="find" value="搜索" onfocus="sch()" onblur="schlose()" />
当我在body里面加上form后就出错，对象不支持此属性或方法。
去掉form后就没有问题。

解决方案 »

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sch,schlose这两个方法怎么写的？
function sch()
{
   document.form1("sch").value="";
}
function schlose()
{
if(document.getElementById("sch").value == "")
{
document.getElementById("sch").value = "搜索";
}
}
    function sch()
    {
       document.getElementById("sch").value="";
    }
<!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=gb2312" />
<title>无标题文档</title>
<link rel="stylesheet" type="text/css" href="Ehome.css">
<style type="text/css">

</style>
</head>
<script type="text/javascript">
function sch()
{
document.getElementById("sch").value = "";
}
function schlose()
{
if(document.getElementById("sch").value == "")
{
document.getElementById("sch").value = "搜索";
}
}
function menu(id)
{
for(i=1;i<8;i++)
{
if(i == id)
{
document.getElementById("tbl"+i).style.display = 'block';
document.getElementById("td"+i).innerHTML="<img src='WEB/tag.gif'/>"
}
else
{
document.getElementById("tbl"+i).style.display = 'none';
document.getElementById("td"+i).innerHTML="";

}
}
}
function pattern()
{
for(i=1;i<8;i++)
{
document.getElementById("tbl"+i).style.display = 'none';
}
}
</script>
<body topMargin=0 onload="pattern()">
<form>
<table width="986" height="38" border="0" align="center" cellpadding="0" cellspacing="0">
  <tr>
    <td width="400"><span class="STYLE4">品质生活 - 爱家无限</span></td>
    <td> </td>
    <td align="right"><table width="200" height="20" border="0" cellpadding="0" cellspacing="0" style="margin-top:8px">
      <tr>
        <td width="65" align="left"><a href="javascript:window.external.AddFavorite('http://www.mstarroom.com','智能家居')">加入收藏</a></td>
        <td width="65" align="left"><a onclick="this.style.behavior='url(#default#homepage)';this.sethomepage('http://www.mstarroom.com');return"
href="http://www.mstarroom.com/" false;="false;">设为首页</a></td>
        <td width="20" align="left" valign="top"><img src="WEB/home.gif" width="16" height="15"/></td>
        <td width="50" align="right"><a href="#">控制后台</a></td>
      </tr>
    </table>      <A href="javascript:window.external.AddFavorite('http://www.mstarroom.com','智能家居')"></A> <A onclick="this.style.behavior='url(#default#homepage)';this.sethomepage('http://www.mstarroom.com');return"
href="http://www.mstarroom.com/" false;="false;"></A><a href="#"> </a></td>
  </tr>
</table>
<table width="980" height="53" border="0" align="center" cellpadding="0" cellspacing="0" style="margin-top:20px">
  <tr>
    <td width="25"><img src="WEB/navigation_1.gif" width="25" height="53" /></td>
    <td width="116" background="WEB/navigation_2.gif" class="logo"> </td>
    <td width="648" background="WEB/navigation_2.gif"><table width="648" height="30" border="0" cellpadding="0" cellspacing="0" class="head" style="margin-top:20px">
        <tr>
          <td width="44" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(1)"> </td>
          <td width="80" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(1)">关于爱得屋</td>
          <td width="80" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(2)">新闻中心</td>
          <td width="80" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(3)">产品系列</td>
          <td width="80" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(4)">解决方案</td>
          <td width="80" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(5)">项目展示</td>
          <td width="80" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(6)">销售网络</td>
          <td width="80" height="18" align="center" valign="top" style="cursor:hand" onmousemove="menu(7)">客服服务</td>
          <td width="44" height="18" align="center" valign="top"> </td>
        </tr>
        <tr>
          <td width="44" align="center"></td>
          <td align="center" id="td1"></td>
          <td align="center" id="td2"></td>
          <td align="center" id="td3"></td>
          <td align="center" id="td4"></td>
          <td align="center" id="td5"></td>
          <td align="center" id="td6"></td>
          <td align="center" id="td7"></td>
          <td width="44" align="center"> </td>
        </tr>
      </table>
    </td>
    <td width="22"><img src="WEB/navigation_3.gif" width="22" height="53" /></td>
    <td width="143" background="WEB/navigation_4.gif"><table width="113" height="20" border="0" cellpadding="0" cellspacing="0">
      <tr>
        <td width="112" height="30" valign="bottom"><input id="sch" name="sch" class="find" value="搜索" onfocus="sch()" onblur="schlose()"/></td>
      </tr>
      <tr>
        <td height="10"> </td>
      </tr>
    </table></td>
    <td width="25"><img src="WEB/navigation_5.gif" width="25" height="53" /></td>
  </tr>
</table>
</form>
</body>
</html>
document.getElementById("tbl"+i).style.display = 'none';
是不是这句的问题??
你那个id为sch的input 没得type啊
和这个没关系，你测试搜索框，加form和不加form。
document.getElementById("tbl"+i).style.display = 'none';
有错，缺少对象
<input id="sch" name="sch" class="find" value="搜索" onfocus="sch()" onblur="schlose()"/> 有错,type='text' 属性少了
下面的内容没贴出来，太长了，原因不在这里，你可以删掉function menu(id)
和pattern()，然后只看搜索框
不是这的原因，加上type='text'和没加一样
function sch1()
    {
        document.getElementById("sch").value = "";
    }<input id="sch" name="sch" class="find" value="搜索" onfocus="sch1()" onblur="schlose()"/>