php+js倒计时代码 秒不动解决思路

<script type="text/javascript">function getTheTime(D,i){     var theDate=new Date(D);     var date = new Date();     var diffTime = theDate - date;     //if(diffTime<=0){      //document.getElementById("diffDay2"+i) .innerHTML="时间已过.";      //return;     //}     var para = 1000 * 60 * 60 * 24;     //var diffday = diffTime / para;     var diffHour = (diffTime % para) / 3600000;     var diffMinute = (diffTime % 3600000 ) / 60000;     var diffSecond = (diffTime % 60000) / 1000;     //document.getElementById("diffDay1"+i).innerHTML = "<b>"+Math.floor(diffday)+ "</b>" + "天 ";     document.getElementById("diffDay2"+i).innerHTML = Math.floor(diffHour) + "小时" + Math.floor(diffMinute) + "分" + Math.floor(diffSecond) + "秒";     setTimeout("getTheTime("+D+","+i+")",1000);          //document.getElementById("test_date").innerHTML = theDate;     //document.getElementById("test_date_1").innerHTML = date;}</script> <?phpinclude_once '../lib/functions.php';$db = new Connection();$connection = $db->connect();$query="SELECT * FROM PICKUPTIME ORDER BY deadline ASC";$sql=queryMysql($query);?><?php$i=0;while($info=mysql_fetch_array($sql)){    $deadline_dinner=$info['deadline'];    if($info['deadline'] == "") continue;    //echo $info['deadline'];    $time_hr=substr($deadline_dinner, 0, 2);    $time_min=substr($deadline_dinner, 2, 4);    $pickup_time_formatted=$time_hr.":".$time_min;    //$c_date=date("Y-m-d");    $deadline=date("Y-m-d")." "."$pickup_time_formatted";    $current_time=date("Y-m-d H:i:s");    if($deadline<$current_time)        $deadline=date("Y-m-d", strtotime('+1 day'))." "."$pickup_time_formatted";    //echo "$deadline";?><div id="test_date"></div>    <div style="float:left;" id="test_date"></div></br>    <div style="float:left;" id="test_date_1"></div></br>        <div style="float:left;" id="diffDay1<?php echo $i;?>"></div>    <div style="" id="diffDay2<?php echo $i;?>"></div>    <script type="text/javascript">    getTheTime("<?php echo $deadline;?>",<?php echo $i;?>);    </script> <?php    $i++;}?> 

//setTimeout("getTheTime("+D+","+i+")",1000);setInterval("getTheTime('" + D + "'," + i + ")", 1000);