Twitter Auto Follower

function _x(STR_XPATH) {
    var xresult = document.evaluate(STR_XPATH, document, null, XPathResult.ANY_TYPE, null);
    var xnodes = [];
    var xres;
    while (xres = xresult.iterateNext()) {
        xnodes.push(xres);
    }

    return xnodes;
}
$(_x('//*[@id="timeline"]/div[1]/div[2]/div/div/div')).append('<button onclick="AutoFollow()" class="btn" type="button"><span class="button-text">Follow all</span></button>');

function AutoFollow() {
    __cnt__ = 0;
    jQuery('.stream button.follow-button > span.follow-text').each(function (i, ele) {
        ele = jQuery(ele);
        if (ele.css('display') != 'block') {
            console.log('already following:', i);
            return;
        }
        setTimeout(function () {
            ele.click();
            following++;
        }, __cnt__++ * 500);
    });
};