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var $ = function (selector) {
    var cl, id, alls, arrEle = [];
    if (/^\./.test(selector)) {
        cl = selector.replace(".", "");
        alls = document.getElementsByTagName("*"), l = alls.length;
        for (var i=0; i<l; i+=1) {
            var name = 	alls[i].className, arrName = [];
            if (name) {
                arrName = name.split(" "), lName = arrName.length;
                for (var j=0; j<lName; j+=1) {
                    if (arrName[j] === cl) {
                        arrEle.push(alls[i]);	
                    }
                }
            }
        }
    } else if (/^#/.test(selector)) {
        id = selector.replace("#", "");
        var o = document.getElementById(id);
        if (o) {
            arrEle.push(o);	
        }
    }
    return arrEle;
};