Mouse wheel double click

This JavaScript will do the trick. Change yourelement name to the name of the Captivate element.

var count = 0;
var timeout;

var myButton = document.getElementById("yourelementname")
myButton.addEventListener("auxclick", captureMouseWheel, false);

function captureMouseWheel( e )
{
if ( e.button == 1 )
{
count++;

if ( !timeout )
{
timeout = setTimeout( function()
{
timeout = undefined;
check();
}, 250);
}
}
else
{
count = 0;
}
}

function check()
{
if ( count >= 2 )
{
//mousewheel doubleclicked
}

count = 0;
}