inserting special characters into a textarea

[kmyadam]

Hi all,

I am creating a form and in which, the user should have an option to insert symbols in the text box. The symbols include Greek symbols, standard mathematical operators and others stuff. How could i make a user interface such that user selects a symbol from the pop-up window, so the selected symbol value should return into the text box.

Can anyone give me a link where i can find the related stuff or sample code to achieve this task. I googled enough but i did not find the exact stuff.....

thanks,
kedar