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jsp中,使用js生成动态的数据库相关的二级联动下拉框
摘要: jsp中,使用js生成动态的数据库相关的二级联动下拉框
<head>
<link> href="../INC/Style.Css" rel="stylesheet" type="text/css"> <script language = "JavaScript">
var onecount;
onecount=0;
subcat = new Array();
<%
int count = 0;
rs = Conn.executeQuery("select * from ego_smallsort order by Sid");//读取数据
while(rs.next())
{
String sname=new String(rs.getString("Sname").getBytes("GBK"),"ISO8859_1");//转换字符类型
%>
subcat[<%=count%>] = new Array("<%=sname%>","<%=rs.getInt("Bid")%>","<%=rs.getInt("Sid")%>");//产生数组
<%
count = count + 1;
}
%>
onecount=<%=count%>; function changelocation(id)
{
document.form1.smallsortselect.length = 0; var id=id;
var i;
document.form1.smallsortselect.options[0] = new Option('选择二级分类','');
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == id)
{
document.form1.smallsortselect.options[document.form1.smallsortselect.length] = new Option(subcat[i][0], subcat[i][2]);
}
}
}
</script>
</head>
<body bgcolor="#FFFFFF"> <form name="form1" method="post" action="">
<table width="500" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td width="180" height="20" align="right">选择一级分类:</td>
<td width="320">
<select name="bigsortselect" onChange="changelocation(document.form1.bigsortselect.options[document.form1.bigsortselect.selectedIndex].value)" size="1">
<option value="2">请选择一级分类</option>
<%
rs = Conn.executeQuery("select * from ego_bigsort order by Bid");
while(rs.next())
{
String Bname = new String(rs.getString("Bname").getBytes("GBK"),"ISO8859_1");
System.out.println(Bname);
%>
<option value="<%=rs.getInt("Bid")%>"><%=Bname%></option>
<%
}
%>
</select>
</td>
</tr>
<tr>
<td height="20" align="right">选择二级分类:</td>
<td>
<select name="smallsortselect">
<option value="" selected>请选择二级分类</option> </select> </td>
</tr>
<tr>
<td height="20" colspan="2" align="center"><input type="submit" name="Submit" value="提交"></td>
</tr>
<script LANGUAGE="JavaScript">
changelocation(document.form1.bigsortselect.options[document.form1.bigsortselect.selectedIndex].value); //将一级分类的value传给changelocation()函数,生成二级分类的列表 </script>
</table>
</form> </body>