<!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>
<script>
function xx()
{
if (document.form1.select.value=="a")
{
document.getElementById("kk1").style.display = "none";
document.getElementById("kk2").style.display = "none";
document.getElementById("kk3").style.display = "none";
}
}
</script>
</head><body>
<form name="form1" id="form1" method="post" action="">
<table width="600" border="0" align="center" cellpadding="4" cellspacing="1">
<tr>
<td> </td>
<td><select name="select" onchange="xx()">
<option selected="selected">选择</option>
<option value="a">a</option>
<option value="b">b</option>
</select></td>
</tr>
<tr>
<td>a</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr>
<td>a</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk1">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk2">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk3">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="Submit" value="提交" />
<input type="reset" name="Submit" value="重置" /></td>
</tr>
</table>
</form>
</body>
</html>
给你写了一半~选a b的全都不见~
<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>
<script>
function xx()
{
if (document.form1.select.value=="a")
{
document.getElementById("kk1").style.display = "none";
document.getElementById("kk2").style.display = "none";
document.getElementById("kk3").style.display = "none";
}
}
</script>
</head><body>
<form name="form1" id="form1" method="post" action="">
<table width="600" border="0" align="center" cellpadding="4" cellspacing="1">
<tr>
<td> </td>
<td><select name="select" onchange="xx()">
<option selected="selected">选择</option>
<option value="a">a</option>
<option value="b">b</option>
</select></td>
</tr>
<tr>
<td>a</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr>
<td>a</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk1">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk2">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk3">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="Submit" value="提交" />
<input type="reset" name="Submit" value="重置" /></td>
</tr>
</table>
</form>
</body>
</html>
给你写了一半~选a b的全都不见~
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<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>
<script>
function xx()
{
if (document.form1.select.value=="a")
{
document.getElementById("kk1").style.display = "none";
document.getElementById("kk2").style.display = "none";
document.getElementById("kk3").style.display = "none";
document.getElementById("ww1").style.display = "block";
document.getElementById("ww2").style.display = "block";
}
if (document.form1.select.value=="b")
{
document.getElementById("kk1").style.display = "block";
document.getElementById("kk2").style.display = "block";
document.getElementById("kk3").style.display = "block";
document.getElementById("ww1").style.display = "none";
document.getElementById("ww2").style.display = "none";
}
}
</script>
</head><body>
<form name="form1" id="form1" method="post" action="">
<table width="600" border="0" align="center" cellpadding="4" cellspacing="1">
<tr>
<td> </td>
<td><select name="select" onchange="xx()">
<option selected="selected">选择</option>
<option value="a">a</option>
<option value="b">b</option>
</select></td>
</tr>
<tr id="ww1">
<td>a</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="ww2">
<td>a</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk1">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk2">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr id="kk3">
<td>b</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="Submit" value="提交" />
<input type="reset" name="Submit" value="重置" /></td>
</tr>
</table>
</form>
</body>
</html>