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<form action="XXXX" method="post">
<table align="center" border="0">
<tr>
<td align="right">
<div id="divseltime1">日期:
<select id="selautotime" name="selautotime" onchange="gotoshowtime(this.value)">
<option value="3">3 Days</option>
<option value="7">7 Days</option>
<option value="30">30 Days</option>
<option value="365">365 Days</option>
<option value="1">This year</option>
<option value="0">选择日期</option>
</select>
</div>
</td>
<td>类型:
<select id="seltype" name="seltype" onchange="gettype(this.value)">
<c:forEach items="${typelist}" var="totype" varStatus="step">
<option value="${step.index }" <c:if test="${totype eq selserver }"> selected='selected'</c:if> > ${totype }</option>
</c:forEach>
</select>
</td>
<td width="20"></td>
<td><input type="button" value="Submit" onclick="gotosubmit()"></input></td>
</tr>
</table>
</form>
String seltype=req.getParameter("seltype");
String autotime=req.getParameter("selautotime");
<input type="button" value="Submit" onclick="gotosubmit()"></input>
function gotoshowtime(vv){
if(vv==0){
$('#divtime2').show();
$('#divseltime1').hide();
}
}
Enumeration enu=req.getParameterNames();
while(enu.hasMoreElements()){
String paraName=(String)enu.nextElement();
System.out.println(paraName+": "+req.getParameter(paraName));
}
<select id="selautotime" name="selautotime" onchange="gotoshowtime(this.value)">
<option value="3">3 Days</option>
<option value="7">7 Days</option>
<option value="30">30 Days</option>
<option value="365">365 Days</option>
<option value="1">This year</option>
<option value="0">选择日期</option>
</select>