(function($){

var mwheelI = {
            pos: [-260, -260]
        },
    minDif     = 3,
    doc     = document,
    root     = doc.documentElement,
    body     = doc.body,
    longDelay, shortDelay
;

function unsetPos(){
    if(this === mwheelI.elem){
        mwheelI.pos = [-260, -260];
        mwheelI.elem = false;
        minDif = 3;
    }
}

$.event.special.mwheelIntent = {
    setup: function(){
        var jElm = $(this).bind('mousewheel', $.event.special.mwheelIntent.handler);
        if( this !== doc && this !== root && this !== body ){
            jElm.bind('mouseleave', unsetPos);
        }
        jElm = null;
        return true;
    },
    teardown: function(){
        $(this)
            .unbind('mousewheel', $.event.special.mwheelIntent.handler)
            .unbind('mouseleave', unsetPos)
        ;
        return true;
    },
    handler: function(e, d){
        var pos = [e.clientX, e.clientY];
        if( this === mwheelI.elem || Math.abs(mwheelI.pos[0] - pos[0]) > minDif || Math.abs(mwheelI.pos[1] - pos[1]) > minDif ){
            mwheelI.elem = this;
            mwheelI.pos = pos;
            minDif = 250;
            
            clearTimeout(shortDelay);
            shortDelay = setTimeout(function(){
                minDif = 10;
            }, 200);
            clearTimeout(longDelay);
            longDelay = setTimeout(function(){
                minDif = 3;
            }, 1500);
            e = $.extend({}, e, {type: 'mwheelIntent'});
            return $.event.handle.apply(this, arguments);
        }
    }
};
$.fn.extend({
    mwheelIntent: function(fn) {
        return fn ? this.bind("mwheelIntent", fn) : this.trigger("mwheelIntent");
    },
    
    unmwheelIntent: function(fn) {
        return this.unbind("mwheelIntent", fn);
    }
});

$(function(){
    body = doc.body;
    //assume that document is always scrollable, doesn't hurt if not
    $(doc).bind('mwheelIntent.mwheelIntentDefault', $.noop);
});
})(jQuery);