function byClassName() {
    if (document.getElementsByClassName == undefined) {
        document.getElementsByClassName = function(className) {
            var hasClassName = new RegExp("(?:^|\\s)" + className + "(?:$|\\s)");
            var allElements = document.getElementsByTagName("*");
            var results = [];

            var element;
            for (var i = 0; (element = allElements[i]) != null; i++) {
                var elementClass = element.className;
                if (elementClass && elementClass.indexOf(className) != -1 && hasClassName.test(elementClass))
                    results.push(element);
            }
            return results;
        }
    }
}

function f_clientWidth() {
    var fish = f_filterResults(
		window.innerWidth ? window.innerWidth : 0,
		document.documentElement ? document.documentElement.clientWidth : 0,
		document.body ? document.body.clientWidth : 0
	);
    var diff = 1024 - fish
    if (diff > 0) {
        var spoon = document.getElementsByClassName('drink_me');
        for (var i in spoon) {
            spoon[i].style.width = (parseInt(spoon[i].style.width) - diff + 'px')
        }
    }
}

function f_filterResults(n_win, n_docel, n_body) {
    var n_result = n_win ? n_win : 0;
    if (n_docel && (!n_result || (n_result > n_docel)))
        n_result = n_docel;
    return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}