My CKEditor code is
window.onload = function()
{
var editor = CKEDITOR.replace( \\\'big_info\\\' );
CKEDITOR.config.height = \\\'330px\\\';
CKEDITOR.
This is explained in the integration Guide
var editor_data = CKEDITOR.instances.big_info.getData();
You can use also the jQuery integration as explained in the CKEditor blog and jQuery integration docs
// Get the editor data.
var data = $( 'textarea.editor' ).val();
// Set the editor data.
$( 'textarea.editor' ).val( 'my new content' );