函数在jquery 1.4.2上有效，但在jquery 1.9.1上无效

Question

I have this script for submitting some data to my database. It works great on 1.4.2 but the template I am using requires 1.9.1 so I updated my site. The problem I am having is that I am now getting an error when I try to call the same function.

Here is my js code:

function drilldown(row_id){  
var dealID = document.getElementById('dealID'+ row_id).value;
var specialnotes = document.getElementById('specialnotes'+ row_id).value;
var ready = document.getElementById('ready'+ row_id).value;
var initials = document.getElementById('initials'+ row_id).value;
var forcust = document.getElementById('forcust'+ row_id).value;
var notes = document.getElementById('notes'+ row_id).value;

$.ajax({
    url: "savedrilldown.php",  
    type: "GET",
      //pass data like this 
    data: {dealID:dealID,specialnotes:specialnotes,ready:ready,initials:initials,forcust:forcust,notes:notes},    
    cache: false,
    success: function(data) {  
    if (data=="1")
    alert("Record updated!" );  
    } 

});  
}

And here is the error that firebug is showing me:

TypeError: $ is undefined [Break On This Error]     
$.ajax({

And here is what I am loading:

<script type="text/javascript" src="js/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="js/jquery-migrate-1.1.1.min.js"></script>
<script type="text/javascript" src="js/jquery-ui-1.9.2.min.js"></script>

Any advise would be appreciated. Thanks very much.

Answer 1

$ is basically jQuery call, if it is not defined, it does not load your jquery for some reason.

Make sure that jquery is loaded correctly and that it is loaded before executing jquery ajax.

Also I want to suggest to use json and data type json to transfer data since it has perfect form to be transmitted via json.