avito.ru browser protection =)

(function(x/**/) {
    (function(f){
        (function a(){
            try {
                function b(i) {
                    if(
                        (''+(i/i)).length !== 1 ||
                        i % 20 === 0
                    ) {
                        (function(){}).constructor('debugger')();
                    } else {
                        debugger;
                    }

                    b(++i);
                }

                b(0);
            } catch(e) {
                f.setTimeout(a, x)
            }
        })()
    })(document.body.appendChild(document.createElement('frame')).contentWindow);
});

HA HA AVITO!