debouncer.js

 function debouncer(func, timeout) {
        var timeoutID;
        timeout = timeout || 300;
        return function () {
            var scope = this , args = arguments;
            clearTimeout( timeoutID );
            timeoutID = setTimeout( function () {
                func.apply( scope , Array.prototype.slice.call( args ) );
            }, timeout);
        };
    }