server side transliteration

When a user comes to my website and types a letter or a word and presses the spacebar, the typed alphabets needs to be transliterated to an indic language. I came across client side script but I want it to be converted to server side script. If the user presses backspace and starts to delete characters, then a pulldown menu with the closest word that is in my serverside data table needs to be displayed. As an example, you can try it here. <[login to view URL]> which has HTML editor. I need it without an HTML editor.