<script language="javascript">
<!--
function fncchange(strv)
{
var o = document.all.s2;
for(var i=0;i<o.length;i++)
{
if(o.options[i].text.substr(o.options[i].text.length-2,2) == strv)
o.options[i].selected = true;
}
}
//-->
</script><select name=s1 onchange="fncchange(this.value);">
<option value=01>mm
<option value=02>cc
<option value=03>44
</select>
<select name=s2>
<option value=001>xx01
<option value=002>xxx02
<option value=003>sdfa03
</select>
<!--
function fncchange(strv)
{
var o = document.all.s2;
for(var i=0;i<o.length;i++)
{
if(o.options[i].text.substr(o.options[i].text.length-2,2) == strv)
o.options[i].selected = true;
}
}
//-->
</script><select name=s1 onchange="fncchange(this.value);">
<option value=01>mm
<option value=02>cc
<option value=03>44
</select>
<select name=s2>
<option value=001>xx01
<option value=002>xxx02
<option value=003>sdfa03
</select>
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- 谁能帮我写个这样的JS??
- JS有无构造函数这一说
<!--
function fncchange(strv)
{
var o = document.all.s2;
for(var i=0;i<o.length;i++)
{
if(o.options[i].value.substr(o.options[i].value.length-2,2) == strv)
o.options[i].selected = true;
}
}
//-->
</script><select name=s1 onchange="fncchange(this.value);">
<option value=01>mm
<option value=02>cc
<option value=03>44
</select>
<select name=s2>
<option value=001>xx
<option value=002>xxx
<option value=003>sdfa
</select>
xxx (02)
sdfa (03)这种关系是怎么建立起来的,请解释一下,不明白原理没法找到答案~~~
2、通过循环从数据库中读取与select1所对应的选项数据
3、调用的时候,把这些数值传给一段js代码,比如changeselect(str1,str2,selectvalue)
4、在js代码中分解这两个字符串,并做成数据
5、通过传递过来的selectvalue判断所对应的组数
6、通过js改变select2的列表内容
<%
dim conn,constr
constr="driver={microsoft access driver (*.mdb)};uid=admin;pwd=数据库密码;dbq="& server.mappath("class.mdb")
set conn=server.createobject("adodb.connection")
conn.open constrset rs=server.createobject("adodb.recordset")
rs.open "select * from school order by anclassid",conn,1,1%>
<script language = "JavaScript">
var onecount;
onecount=0;
subcat = new Array();
<%
count = 0
do while not rs.eof
%>
subcat[<%=count%>] = new Array("<%= trim(rs("anclassid"))%>","<%= rs("anclass")%>","<%= rs("nclass")%>");
<%
count = count + 1
rs.movenext
loop
rs.close
%>
onecount=<%=count%>;function changelocation(locationid)
{
document.form.Nclassid.length = 0; var locationid=locationid;
var i;
for (i=0;i < onecount; i++)
{
if (subcat[i][0] == locationid)
{
document.form.Nclassid.options[document.form.Nclassid.length] = new Option(subcat[i][2], subcat[i][2]);
}
}
}
</script>
<%
set rs=server.createobject("adodb.recordset")
rs.open "select distinct anclassid,anclass from school order by anclassid",conn,1,1
if rs.eof and rs.bof then
response.write "请先添加栏目。"
response.end
else
%>
<form name="form">
<select name="anclassid" size="1" id="class" onChange="changelocation(document.form.anclassid.value)">
<option selected value="<%=rs("anclassid")%>"><%=trim(rs("anclass"))%></option>
<% dim selclass
selclass=rs("anclassid")
rs.movenext
do while not rs.eof
%>
<option value="<%=rs("anclassid")%>"><%=trim(rs("anclass"))%></option>
<%
rs.movenext
loop
end if
rs.close
%>
</select>
<select name="Nclassid">
<%rs.open "select * from school where anclassid="&selclass ,conn,1,1
if not(rs.eof and rs.bof) then
%>
<option selected value="<%=rs("nclass")%>"><%=rs("nclass")%></option>
<% rs.movenext
do while not rs.eof%>
<option value="<%=rs("nclass")%>"><%=rs("nclass")%></option>
<% rs.movenext
loop
end if
rs.close
set rs = nothing
%>
</select>
</form>