<!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>无标题文档</title>
</head>
<body>
<select onchange="fun(this)">
<option>请选择</option>
<option value="A">A</option>
<option value="B">B</option>
</select>
<br />
<input type="checkbox" name="A" checked="checked" />C1<br />
<input type="checkbox" name="A" checked="checked" />C1<br />
<input type="checkbox" name="A" checked="checked" />C1<br /><br />
<input type="checkbox" name="B" checked="checked" />C2<br />
<input type="checkbox" name="B" checked="checked" />C2<br />
<input type="checkbox" name="B" checked="checked" />C2<br />
<script type="text/javascript">
function fun(sel)
{
if(sel.selectedIndex==0)
return;
var name = sel.options[sel.selectedIndex].value;
var box = document.getElementsByName(name);
for(var i=0;i<box.length;i++)
box[i].checked = false;
}
</script>
</body>
</html>
用if else……去改成对应的checkbox的name
<!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>无标题文档</title>
</head>
<body>
<select onchange="fun(this)">
<option>请选择</option>
<option value="A">A</option>
<option value="B">B</option>
</select>
<br />
<input type="checkbox" name="A" checked="checked" />C1<br />
<input type="checkbox" name="A" checked="checked" />C1<br />
<input type="checkbox" name="A" checked="checked" />C1<br /><br />
<input type="checkbox" name="B" checked="checked" />C2<br />
<input type="checkbox" name="B" checked="checked" />C2<br />
<input type="checkbox" name="B" checked="checked" />C2<br />
<script type="text/javascript">
function fun(sel)
{
if(sel.selectedIndex==0)
return;
//改一下好了
var name = '';
if(sel.selectedIndex==1)
name="A";
else if(sel.selectedIndex==2)
name="B";
//...
var box = document.getElementsByName(name);
for(var i=0;i<box.length;i++)
box[i].checked = false;
}
</script>
</body>
</html>
现有复选框AB两个,文本框CD两个,我想实现:选A时,只有C可用,不选则不可用;选B时,只有D可用,不选则不可用,
注:复选框和文本框都是从数据库的表里循环出来的,并且所有文本框初始都为不可用,像以下这样
<%
String s1 = "select * from sportxm where xmsubclass='a'";
ResultSet rs = db1.executeQuery(s1);
%>
<tr>
<td>运动员</td>
<td>
<%
int c = 1;
while (rs.next()) {
String ss = rs.getString(2);
int si = rs.getInt(1);
String ssi = String.valueOf(si);
c++;
if (c % 2 == 0) {
out.println("<br>");
}
%>
<input type="checkbox" name="stxm" value="<%=ssi%>"/>
<%=ss%> <达标成绩>
<input name="dbcj" type="text" id="dbcj" width="40" disabled="disabled"> <input name="zjcj" type="text" id="zjcj" width="40" disabled="disabled">
<最佳成绩>
<input type="text" name="textfield" width="40" disabled="disabled">
<input type="text" name="textfield2" width="40" disabled="disabled">
<%
}
rs.close();
db1.close();
%>
</td>
</tr>
我想实现:选A时,只有C可用,不选则不可用;选B时,只有D可用,不选则不可用,如何写啊?急啊?!