How can I update the DOM after Ajax Call (jQuery)?

Question

How can I update the DOM with new record added element after call?

Should I return the newly inserted db record contents on call back then append using jquery?

Please advice if not enough data to answer question.

$(function(){

        $('#postentry').submit(function() {
          var tyu = $('#tittle_ent').val();
          if(tyu.length <= 2)
            {alert('Enter More Text!'); return false;}else
            {
                $.post(  
                 "posts_in.php",  
                 $("#postentry").serialize(),  
                    function(data){  
                        //alert(data); 
                    }  
                );  
                return false;
            }
        });

    });

Each record look like this:

<div id="post349" class="myclass">
This is some text.    
</div>

Answer 1

I'd use $.ajax() instead of $.post():

$.ajax({
    type:'post',
    url: 'posts_in.php',
    data: $("#postentry").serialize(),
    success:function(data){
        var id='post349';
        $('<div></div>').attr('id',id).addClass('myclass').html(data).appendTo('#records_wrapper');
    }
});

Quick demo of how the div will be appended and populated: http://jsfiddle.net/AlienWebguy/zuPA2/1/

Answer 2

You can either return a complete record in the surrounding div from php or you can just get the newly inserted ID and build the record in javascript.