Determine input (interaction) method in IE10. Has to fire an event first.

ie10_get_input_method.js

var Globals = {};

function handleIE10TouchEvent(event)
// Determines which input method is available
// in IE10 - mouse, pen or a touch cap. device
{
    switch (event.pointerType)
    // Refactor to if-then-else for a faster
    // and more compatible solution
    {
        case event.MSPOINTER_TYPE_TOUCH:
            Globals.ie10_hasTouch = true;
        break;

        case event.MSPOINTER_TYPE_PEN:
            Globals.ie10_hasPen = true;
        break;

        case event.MSPOINTER_TYPE_MOUSE:
            Globals.ie10_hasMouse = true;
        break;
    }
}

function readyDocument()
// Handler for window.onload
{
    // Event listener args
    var args = 
        [
            'MSPointerMove',      // That magic event of IE10
            handleIE10TouchEvent, // Handler
            false                 // Phase
        ];
    
    // Set IE10 input event listener
    document
        .addEventListener
        .apply(document, args);
}

// Do something when document is ready
window.onload = readyDocument;