Question

ASP二级联动代码

我想把大类选择默认为空，也就是大类默认为
<option selected value="">==请选择==</option>
应该怎么加上？在那里加？按常规的加不上，小类却没事，头疼！！

代码如下：

<!--二级联动js开始-->
<%
set rsbig=server.CreateObject("adodb.recordset")
sqlbig="select * from bigclass"
rsbig.open sqlbig,conn,1,1

set rsmin=server.CreateObject("adodb.recordset")
sqlmin="select * from minclass"
rsmin.open sqlmin,conn,1,1
%>
<SCRIPT language = "javascript">
var onecount;
onecount=0;
subcat = new Array();
<%
count = 0
do while not rsmin.eof
%>
subcat[<%=count%>] = new Array("<%= trim(rsmin("minclassname"))%>","<%= trim(rsmin("bigid"))%>","<%= trim(rsmin("minID"))%>");
<%
count = count + 1
rsmin.movenext
loop
%>
onecount=<%=count%>;

function change2(locationid2)
{
document.form.minname.length = 0;

var locationid2=locationid2;
var i;
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == locationid2)
{
document.form.minname.options[document.form.minname.length] = new Option(subcat[i][0], subcat[i][2]);
}
}

}

</SCRIPT>
<!--二级联动js结束-->

<!--选择大类-->
<form action=pai.asp method=post name="form">
<select size="1" name="bigname" onchange="change2(document.form.bigname.options[document.form.bigname.selectedIndex].value)"

<%do while not rsbig.eof%>
<option value="<%=(rsbig.Fields.Item("bigID").Value)%>"><%=(rsbig.Fields.Item("bigclassname").Value)%></option>
<%rsbig.movenext
loop%>
</select>

<!--选择小类-->
<select size="1" name="minname">
<option selected value="">==请选择==</option>
</select>
</form>
1楼的不行的，按常规加直接就不显示，我早就试过了

Answer 1

<%
set rsbig=server.CreateObject("adodb.recordset")
sqlbig="select * from bigclass"
rsbig.open sqlbig,conn,1,1

set rsmin=server.CreateObject("adodb.recordset")
sqlmin="select * from minclass"
rsmin.open sqlmin,conn,1,1
%>
<SCRIPT language = "javascript">
var onecount;
onecount=0;
subcat = new Array();
<%
count = 0
do while not rsmin.eof
%>
subcat[<%=count%>] = new Array("<%= trim(rsmin("minclassname"))%>","<%= trim(rsmin("bigid"))%>","<%= trim(rsmin("minID"))%>");
<%
count = count + 1
rsmin.movenext
loop
%>
onecount=<%=count%>;

function change2(locationid2)
{
document.form.minname.length = 0;

var locationid2=locationid2;
var i;
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == locationid2)
{
document.form.minname.options[document.form.minname.length] = new Option(subcat[i][0], subcat[i][2]);
}
}

}

</SCRIPT>
<!--二级联动js结束-->

<!--选择大类-->
<form action=pai.asp method=post name="form">
<select size="1" name="bigname" onchange="change2(document.form.bigname.options[document.form.bigname.selectedIndex].value)">
<option value="">====请选择===</option>
<%do while not rsbig.eof%>
<option value="<%=(rsbig.Fields.Item("bigID").Value)%>"><%=(rsbig.Fields.Item("bigclassname").Value)%></option>
<%rsbig.movenext
loop%>
</select>

<!--选择小类-->
<select size="1" name="minname">
<option selected value="">==请选择==</option>
</select>
</form>