This option specifies how elements is to be converted into TinyMCE WYSIWYG editor instances. This option can be set to any of the values below.
textareas
Converts all textarea elements to editors when the page loads.
specific_textareas
Converts all textarea elements with the a textarea_trigger attribute set to "true".
exact
exact - Converts only explicit elements, these are listed in the elements option. These elements can be any kind for example textareas or divs.Example of usage of the mode option:
tinyMCE.init({
...
mode : "exact",
elements : "elm1,elm2"
});