function array_push (inputArr) {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // %        note 1: Note also that IE retains information about property position even
    // %        note 1: after being supposedly deleted, so if you delete properties and then
    // %        note 1: add back properties with the same keys (including numeric) that had
    // %        note 1: been deleted, the order will be as before; thus, this function is not
    // %        note 1: really recommended with associative arrays (objects) in IE environments
    // *     example 1: array_push(['kevin','van'], 'zonneveld');
    // *     returns 1: 3
    var i = 0,
        pr = '',
        argv = arguments,
        argc = argv.length,
        allDigits = /^\d$/,
        size = 0,
        highestIdx = 0,
        len = 0;
    if (inputArr.hasOwnProperty('length')) {
        for (i = 1; i < argc; i++) {
            inputArr[inputArr.length] = argv[i];
        }
        return inputArr.length;
    }

    // Associative (object)
    for (pr in inputArr) {
        if (inputArr.hasOwnProperty(pr)) {
            ++len;
            if (pr.search(allDigits) !== -1) {
                size = parseInt(pr, 10);
                highestIdx = size > highestIdx ? size : highestIdx;
            }
        }
    }
    for (i = 1; i < argc; i++) {
        inputArr[++highestIdx] = argv[i];
    }
    return len + i - 1;
}