ifastest.ru clicker

var dispatchMouseEvent = function(target, var_args) {
  var e = document.createEvent("MouseEvents");
  e.initEvent.apply(e, Array.prototype.slice.call(arguments, 1));
  target.dispatchEvent(e);
};
function mouseClick(target) {
  dispatchMouseEvent(target, 'mousedown', true, true);
  target.focus();
  dispatchMouseEvent(target, 'mouseup', true, true);
};
var ex = document.getElementById("example");
var ctx = ex.getContext("2d");
function check() {
    if (ctx.getImageData(0,0,1,1).data[0] === 0) {
        mouseClick(ex);
    }
    setTimeout(function(){
                check();
            }, 1);
};
check();