修改template/pc/postform.html和template/wap/postform.html
template/pc/postform.html 電腦發(fā)布信息模板

	<div class="kf_nform_item">
		<label class="bitian">有效期</label>
		<div class="inputwrap" id="inp_overdate">
			<input type="text" name="overdate" value="30" id="overdate" />
		</div>
		<div class="inputwrap" id="com_overdate">（天）</div>
		<div class="inputwrap"><input type="checkbox" id="ckoverdate" name="ckoverdate" class="magic-checkbox" value="1"  /><label for="ckoverdate">長(zhǎng)期有效</label></div>
	</div>

改成

	<div class="kf_nform_item" style="display: none;">
		<label class="bitian">有效期</label>
		<div class="inputwrap" id="inp_overdate">
			<input type="text" name="overdate" value="30" id="overdate" />
		</div>
		<div class="inputwrap" id="com_overdate">（天）</div>
		<div class="inputwrap"><input type="checkbox" id="ckoverdate" name="ckoverdate" class="magic-checkbox" value="1" checked  /><label for="ckoverdate">長(zhǎng)期有效</label></div>
	</div>

template/wap/postform.html 手機(jī)發(fā)布信息模板

	<div class="kf_mform_item">
				<div class="inputwrapbox">
					<label>有效期</label><div class="fr5" style="padding:10px 0px;">
						<input type="checkbox" name="ckoverdate" id="ckoverdate" value="1" class="magic-checkbox" /><label for="ckoverdate">長(zhǎng)期有效</label></div>
					<div class="inputwrap overdate" style="margin-left: 50px; margin-right:100px;"><input type="text" name="overdate" value="30" id="overdate" />
					<div class="unit overdate">（天）</div></div>
					
				</div>
			</div>

修改為

			<div class="kf_mform_item" style="display: none">
				<div class="inputwrapbox">
					<label>有效期</label><div class="fr5" style="padding:10px 0px;">
						<input type="checkbox" name="ckoverdate" id="ckoverdate" value="1" class="magic-checkbox" checked /><label for="ckoverdate">長(zhǎng)期有效</label></div>
					<div class="inputwrap overdate" style="margin-left: 50px; margin-right:100px;"><input type="text" name="overdate" value="30" id="overdate" />
					<div class="unit overdate">（天）</div></div>
					
				</div>
			</div>