How to check whether CKEditor has some text in it?

Question

I have an HTML form with a few fields. One of them is a textarea managed by CKEditor.

When the user wants to submit the form, I want to check whether he entered values

Answer 1

CKeditor has its own built in function for retrieving data in a text editor:

function CheckForm(theForm) 
{
    textbox_data = CKEDITOR.instances.mytextbox.getData();
    if (textbox_data==='')
    {
        alert('please enter a comment');
    }
}

Documentation