Embeding vitual keyboard in Search box

I want to add a virtual keyboard to search box on omeka site so that items available in multiple languages can be searched by visitors easily. Can you guide about installing the virtual keyboard given on the following link
http://www.greywyvern.com/code/javascript/keyboard

I have downloaded .js and .css files. My question is to where do I need to place this file in omeka installation/server. secondly, which file should I add the given script to enable the virtual keyboard.