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<div class="mydiv" style="border:1px solid #000; width:100px; height:100px;">
<button>1</button>
<button>2</button>
<button>3</button>
<button>4</button>
<button>5</button>
<button>6</button>
<button>7</button>
<button>8</button>
<button>9</button>
<button>0</button>
</div>
<script>
(function(){
var btns = document.getElementsByTagName("button");
var n = 0;
for(var i = 0,o;o=btns[i];i++){
o.onclick = function(){
if(++n >= 4){
document.querySelector(".mydiv").style.display = "none";
}
}
}
})();
</script>
var count = 0;
$("button").on("click",function(){
count++;
if(count>=3){ $(".mydiv").hide(); }
})