how to use ajax in magento backend

Question

why ajax call from magento backend(from .phtml) redirects to magento dashboard despite of sending form key properly with form? please help.

in ajax call :

var dataRecord = j('#newForm').serialize(); 
    var url = "<?php echo $this->getUrl('*/*/addNewColumn') ?>";

    j.ajax({
    type: "POST",
    url: url,
    data: {data1: dataRecord}
    })
    .done(function( msg ) {
        alert(msg);
    });

Answer 1

It worked when i sent the form_key in 'data' of ajax call.

var dataRecord = jQuery('#newForm').serialize(); 
var url = "<?php echo $this->getUrl('*/*/addNewColumn') ?>";
<?php $k = Mage::getSingleton('core/session')->getFormKey(); ?>

jQuery.ajax({
type: "POST",
url: url,
data: {data1: dataRecord,form_key:'<?php echo $k ?>'}
})
.done(function( msg ) {
    alert(msg);
});