jsp中中select的的onchange事件用法实例事件用法实例
主要介绍了jsp中select的onchange事件用法,以实例形式较为详细的分析了JSP数据库查询、遍历及结合
JavaScript响应鼠标事件处理select相关技巧,需要的朋友可以参考下
本文实例讲述了jsp中select的onchange事件用法。分享给大家供大家参考,具体如下:
<script language = "JavaScript">
var onecount;
onecount=0;
subcat = new Array();
<%
int count = 0;
java.sql.ResultSet rs1 = DBManage.executeQuery("select hydm,zhydm,zhymc from zhy ");//读取数据
while(rs1.next())
{
String selhydm=rs1.getString("hydm").trim();
String zhydm=rs1.getString("zhydm").trim();
String zhymc=rs1.getString("zhymc").trim();
%>
subcat[<%=count%>] = new Array("<%=zhydm%>","<%=selhydm%>","<%=zhymc%>");//产生数组
<%
count = count + 1;
}
if(rs1!=null) DBManage.closeCOnn();
%>
onecount=<%=count%>;
function changelocation(id)
{
document.form1.selzhy.length = 0;
var hydm=id;
var i;
document.form1.selzhy.options[0] = new Option('选择子行业分类','');
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == hydm)
{
document.form1.selzhy.options[document.form1.selzhy.length] = new Option(subcat[i][2], subcat[i][0]);
}
}
}
</script>
<table width="500" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td width="180" height="20" align="right">选择行业分类:</td>
<td width="320">
<select name="selhy" onChange="changelocation(document.form1.selhy.options[document.form1.selhy.selectedIndex].value)" size="1" >
<option value="2">请选择行业分类</option>
<%
rs = DBManage.executeQuery("select * from hy");
while(rs.next())
{
String hydm=rs.getString("hydm").trim();
String hymc=rs.getString("hymc").trim();
%>
<option value="<%=hydm%>"><%=hymc%></option>
<%
}
if(rs!=null) DBManage.closeCOnn();
%>
</select>
</td>
</tr>
<tr>
<td height="20" align="right">选择子行业分类:</td>
<td>
<select name="selzhy" >
<option value="" selected>请选择子行业分类</option>
</select>
</td>
</tr>
</table>
<form name=form1>
<select name=province onchange="cityName(this.selectedIndex)">
<option value="">请选择省名</option>
</select>
<select name=city>
<option value="">请选择城名</option>
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