下拉框，js、php

<select name="cycle" id="cycle">
<option value="">请选择</option>
<option value="3"<?php if($_GET['cycle']== '3'){?>selected="true" <?php }?>>大循环</option>
<option value="1"<?php if($_GET['cycle']== '1'){?>selected="true" <?php }?>>区域循环</option>
<option value="2"<?php if($_GET['cycle']== '2'){?>selected="true" <?php }?>>小循环</option>
</select>

 

<select name="area" <?php if($_GET['cycle']!= '1'){?>style="display:none" <?php }?> id="area">
<?php foreach ($output['area'] as $vo){?>
<option value="<?php echo $vo['id']?>" <?php if($_GET['area']==$vo['id']){?>selected="true" <?php }?>><?php echo $vo['cycle_name'] ?></option>
<?php }?>
</select>

 

<script type="text/javascript">
$(document).ready(function(){
$('#cycle').change(function(){
var a=$('#cycle').val();
if(a==1){
$('#area').show();
}else{
$('#area').hide();
}

})
})
</script>