在ajax load（）之后禁用按钮

index.php page

echo"<div id='div_com'></div>";
<script>

$(document).ready(function(){
    var time= setInterval(function(){
   $("#div_com").load('showingthis.php')
   },1000);
 )};

</script>

showingthis.php

echo " <div id='divtextarea'><button id='reply_reply'type='button'>Reply</button></div>";  

how to disable this button??after call ajax load();

load() has a complete callback argument available

var time= setInterval(function(){
   $("#div_com").load('showingthis.php', function(){
       // new html has loaded
       $('#reply_reply').prop('disabled', true);
    });
},1000);