YaoRaoLov 2010-02-05 00:23 采纳率: 50%
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用 jQuery 检查复选框是否被选中

How can I check if a checkbox in a checkbox array is checked using the id of the checkbox array?

I am using the following code, but it always returns the count of checked checkboxes regardless of id.

function isCheckedById(id) {
  alert(id);
  var checked = $("input[@id=" + id + "]:checked").length;
  alert(checked);

  if (checked == 0) {
    return false;
  } else {
    return true;
  }
}

转载于:https://stackoverflow.com/questions/2204250/check-if-checkbox-is-checked-with-jquery

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  • 妄徒之命 2010-02-05 00:31
    关注

    IDs must be unique in your document, meaning that you shouldn't do this:

    <input type="checkbox" name="chk[]" id="chk[]" value="Apples" />
    <input type="checkbox" name="chk[]" id="chk[]" value="Bananas" />
    

    Instead, drop the ID, and then select them by name, or by a containing element:

    <fieldset id="checkArray">
        <input type="checkbox" name="chk[]" value="Apples" />
    
        <input type="checkbox" name="chk[]" value="Bananas" />
    </fieldset>
    

    And now the jQuery:

    var atLeastOneIsChecked = $('#checkArray:checkbox:checked').length > 0;
    //there should be no space between identifier and selector
    
    // or, without the container:
    
    var atLeastOneIsChecked = $('input[name="chk[]"]:checked').length > 0;
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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