Super simple to get double click "desktop" like functionality out of Prototype! For some reason, googling it doesn't yield many useful results. http://www.google.com/#hl=en&q=double+click+in+prototype+javascript&aq=f&oq=&aqi=&fp=peEfEjG9pWY :(

Anyway, here is the code

    document.observe('dblclick', function(){
        alert("Hello World");
    });