判断多行文本框是否重复输入

<p class="psy"><span>sn:</span><input type="text" class="intx" oninput="checkSame()"><span></span></p>
<p class="psy"><span>sn:</span><input type="text" class="intx" oninput="checkSame()"><span></span></p>
<p class="psy"><span>sn:</span><input type="text" class="intx" oninput="checkSame()"><span></span></p>
<p class="psy"><span>sn:</span><input type="text" class="intx" oninput="checkSame()"><span></span></p>
<p class="psy"><span>sn:</span><input type="text" class="intx" oninput="checkSame()"><span></span></p>
<p class="psy"><span>sn:</span><input type="text" class="intx" oninput="checkSame()"><span></span></p>

<span id="cc" style=" display:block; line-height:50px; width:200px;color:red; border:#036 solid 1px;">456</span>

function checkSame(){
       var dataArray = new Array();
       var inputArray = $(".intx");
       for(var i = 0; i<inputArray.length; i++){
            dataArray[i] = inputArray[i].value;
       } 
       checkArray(dataArray);
      
}

function checkArray(someArray){
    var newArray = someArray.sort();
       for(var i=0;i<newArray.length;i++){
           if(newArray[i] == newArray[i+1] && newArray[i]!=0){
                $(‘#cc‘).html(‘sn重复输入‘);
                break;
           }else{
                $(‘#cc‘).html(‘sn可用‘);
           }
       }
}