Javascript數組沒有得到陣列結果

Question

HTML：

<input type="text" onblur="tournamentPrize(this.value);" placeholder="Player Number" id="player_number" name="data[Tournament][player_number]"> 

的Javascript：

function tournamentPrize(v){ 
     var myArray=[2, 4, 8, 16, 32, 64, 128]; 
     var field_val = v; 
     if(myArray.indexOf(field_val)==-1){ //alert(myArray.indexOf(field_val)); 
      if(field_val==2){ 
       $('#_1st_prize').removeAttr('disabled');     
       $('#_2nd_prize').attr('disabled','disabled'); 
       $('#_2nd_prize').val('');    
       $('#_3rd_prize').attr('disabled','disabled'); 
       $('#_3rd_prize').val(''); 
       $('#_4th_prize').attr('disabled','disabled'); 
       $('#_4th_prize').val('');    
       $('#rest_prize').attr('disabled','disabled'); 
       $('#rest_prize').val(''); 
      }else if(field_val==4){ 
       $('#_1st_prize').removeAttr('disabled');     
       $('#_2nd_prize').removeAttr('disabled');    
       $('#_3rd_prize').attr('disabled','disabled'); 
       $('#_3rd_prize').val(''); 
       $('#_4th_prize').attr('disabled','disabled'); 
       $('#_4th_prize').val('') 
       $('#rest_prize').removeAttr('disabled'); 
      }else{ 
          alert("You have entered "+field_val+" number"); 
      } 
     } 
     else{ 
      alert("You have entered wrong number"); 
     } 
    } 

我已經打電話tournamentPrize（）函數的onblur這個領域，當我輸入任意數目是沒有顯示正確的結果。總是顯示-1

我想得到我正確的結果，當我將輸入2,4,8,16,32,64和128但如果我輸入任何數字除了上面的數字結果也顯示錯誤。

假設我想進入3警報框將來到警報（「你輸入錯號」）;但它顯示警報（「您已輸入3號碼」）;

請有人幫助我

Answer 1

function tournamentPrize(v){ 
     var myArray=[2, 4, 8, 16, 32, 64, 128]; 

     var field_val = +v; // convert value to number from string 
     // OR var field_val = parseInt(v); OR var field_val = Number(v); 

     if(myArray.indexOf(field_val) !== -1){ //entered valid value in array 
      if (field_val==2) { 
       .... 
      } else if(field_val==4){ 
       ..... 
      } else{ 
       alert("You have entered "+field_val+" number"); 
      } 
     } 
     else{ 
      alert("You have entered wrong number"); 
     } 
} 

Answer 2

function tournamentPrize(v){ 
    var myArray=[2, 4, 8, 16, 32, 64, 128]; 
    var field_val = v; 
    if(myArray.indexOf(field_val)!=-1){ //alert(myArray.indexOf(field_val)); 
     if(field_val==2){ 
      $('#_1st_prize').removeAttr('disabled');     
      $('#_2nd_prize').attr('disabled','disabled'); 
      $('#_2nd_prize').val('');    
      $('#_3rd_prize').attr('disabled','disabled'); 
      $('#_3rd_prize').val(''); 
      $('#_4th_prize').attr('disabled','disabled'); 
      $('#_4th_prize').val('');    
      $('#rest_prize').attr('disabled','disabled'); 
      $('#rest_prize').val(''); 
     }else if(field_val==4){ 
      $('#_1st_prize').removeAttr('disabled');     
      $('#_2nd_prize').removeAttr('disabled');    
      $('#_3rd_prize').attr('disabled','disabled'); 
      $('#_3rd_prize').val(''); 
      $('#_4th_prize').attr('disabled','disabled'); 
      $('#_4th_prize').val('') 
      $('#rest_prize').removeAttr('disabled'); 
     }else{ 
         alert("You have entered "+field_val+" number"); 
     } 
    } 
    else{ 
     alert("You have entered wrong number"); 
    } 
} 

Answer 3

您可以使用document.getElementByIdonblur我創建了一個JSFiddle