JavaScript - 简单查询 [英] JavaScript - Simple Query

问题描述

请参阅我已有的 JSFiddle 代码。我的问题是我需要使用无线电检查 AND 文本字段中的文本条目以启用其他无线电，复选框和文本字段。到目前为止，我只设法使用无线电选项1 OR 无线电选项2启用无线电，复选框和文本字段。

Please see the JSFiddle code I already have. My issue is that I require to use a radio check AND a text entry into a text field to enable other radios, checkboxes and text fields. So far I have only managed to enable radios, checkboxes and text fields using radio option 1 OR radio option 2.

此 JSFiddle 可以帮助你们，让你们更加了解我的意思。

This JSFiddle might help you guys out and give you a greater understanding of what I mean.

HTML：

 <div class='conlabel'>Have you started trading yet?</div>
  <table width="100">
          <tr>
            <td><label>
              <input type="radio" name="example" value="Yes" id="example_0" required />
              Yes</label></td>
      </tr>
      <tr>
        <td><label>
          <input type="radio" name="example" value="No" id="example_1" required />
          No</label></td>
      </tr>
</table><br>
  <li>
      <div class='conlabel'>If Yes, enter trading name:</div>
      <input type="text" id="field1" name="field1" placeholder="" disabled />
  </li><br>
  <li>
  <div class='conlabel'>If No, then:</div>
      <input type="text" id="field2" name="field2" placeholder="" disabled />
  </li><br>

<li>
      <div class='conlabel'>Enter trading start date (enabled when started trading yet = yes + trading name = notnull:</div>
      <input type="text" id="field3" name="field3" placeholder="" disabled />
 </li><br>

JS：

$(function(){
$("#example_0, #example_1").change(function(){
    $("#field1, #field2").val("").attr("disabled",true);
    if($("#example_0").is(":checked")){
        $("#field1").removeAttr("disabled");
        $("#field1").focus();
    }
    else if($("#example_1").is(":checked")){
        $("#field2").removeAttr("disabled");
        $("#field2").focus();   
    }
});
});

在此示例中，代码当前启用并关注field1 OR field2，具体取决于它们是否将radio-example_0或example_1分区我不是一个什么样的人如果他们选择是（example_0），然后在field1中输入交易名称，那么启用field3。

In this example the code currently enables and focuses on either field1 OR field2 depending on whether they section radio-example_0 or example_1. What I have not been able to figure out is if they select Yes (example_0) and then enter a trading name in field1 how then to enable field3.

希望这比我上一次尝试更清楚。谢谢你的帮助！ （：

Hope this is clearer than my last attempt. Thanks for your help! (:

答案：请 Daniel V 。

$(function(){
    $("#example_0, #example_1").change(function(){
        $("#field1, #field2").val("").attr("disabled",true);
            if($("#example_0").is(":checked")){
            $("#field1").removeAttr("disabled");
            $("#field1").focus();
        }
        else if($("#example_1").is(":checked")){
            $("#field2").removeAttr("disabled");
            $("#field2").focus();   
        }
    });
    });

$("#field1").blur(function(){
    if($("#example_0").is(":checked")){
             if($("#field1").val()!==""){
                   $("#field3").removeAttr("disabled");
            }
        }
    });

推荐答案

是的，你可以制作一个看起来像的选择器对于选中的复选框和非空文本框：

Yes, you can make a selector that looks for the checked checkbox and a non-empty text box:

if ($('#example1:checked,#textfield1[value!=""]').length == 2) {

演示： http://jsfiddle.net/Guffa/rQKRH/

使用该HTML代码，您可以使用此代码确定是否应启用文本框：

With that HTML code you can use this to determine if the text box should be enabled:

var enable = $('#example_0').is(':checked') && $('#field1').val() != '';

演示： http://jsfiddle.net/Guffa/cEaeK/18/

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