一个三级联动菜单.第一级第二级第三级依次选择,最关心的是第三级的内容.我想把第三级的内容即时显示在textarea中,请问用什么事件处理?谢谢!
部分代码如下:(用java做的三级联动菜单^^)
<form onsubmit= "return(confirm( '确认提交吗？ ')) " name= "myform " method= "post " action= "do_sqzx.asp ">
<div align= "center ">
<table bgcolor= "#0099cc " width= "768 " cellspacing= "0 " cellpadding= "0 ">
<tr>
<td width= "100% " align= "center " bgcolor= "#FFFFFF "> <span class= "STYLE2 "> 车辆故障描述 </span> </td>
</tr>
<tr>
<td> <table bgcolor= "#0099cc " width= "768 " cellspacing= "0 " cellpadding= "0 ">
<tr>
<td width= "29% " nowrap= "nowrap "> 大 类
<select name= "s1 " onChange= "changelocation(document.myform.s1.options[document.myform.s1.selectedIndex].value) ">
<option selected= "selected "> --请选择大类-- </option>
<%
sql1 = "select * from a order by dalei_mc asc "
set rs1 = cn.Execute (sql1)
do while not rs1.eof
%>
<option value= " <%=trim(rs1( "a_id "))%> "> <%=trim(rs1( "dalei_mc "))%> </option>
<%
rs1.movenext
loop
rs1.close
set rs1 = nothing
cn.Close
set conn = nothing
%>
</select> </td>
<td width= "36% " align= "left "> 总成名称
<select name= "s2 " onchange= "changelocation2(document.myform.s2.options[document.myform.s2.selectedIndex].value) ">
<option selected= "selected " value= " "> --请选择总成名称-- </option>
</select> </td>
<td> 故障描述
<select name= "s3 ">
<option selected= "selected "> --请选择故障描述-- </option>
</select> </td>
</tr>
<tr> <td colspan= "3 "> <textarea name= "gz_meno " cols= "50 " rows= "5 "> </textarea>
------解决方案--------------------
<select name= "s3 " onchange= "InsertTxt() ">
<script>
function InsertTxt()
{
if (document.myform.s3.selectedIndex!=0)
{
document.myform.gz_meno.value = " ";
document.myform.gz_meno.value=document.myform.s3.options[document.myform.s3.selectedIndex].value;
}
}
</script>
------解决方案--------------------
document.myform.s3.options[document.myform.s3.selectedIndex].text;
------解决方案--------------------