Wrap highlighted text within textarea with strong tags using javascript/jquery -

i looking create javascript/jquery function wrap piece of highlighted text textarea in strong tags - similar wysiwyg editor here.

is possible , if can point me in right direction.

edit:

ok here's clearer description of want...

i have textbox on page can type in.

i want able highlight part of text , wrap highlighted part in <strong> tags

so if text box had words one 2 three , highlighted word "two", want able wrap word in strong tags - becoming one <strong>two</strong> three

hope clearer... know there plugins out there don't need full wysiwyg functionality.

my rangy inputs (terrible name, know) jquery plug-in this.

example code:

$("#foo").surroundselectedtext("<strong>", "</strong>");

Expalin