Javascript 启用按钮不工作

尝试禁用“执行”按钮，直到单击“提交”按钮。 但点击提交按钮后，“执行”按钮应被启用

HTML-

<form id="form1" name="form1" method="post" action="" >
  <span id="spryselect1">
       <label for="flow">Select  Flow</label>
          <select name="Select Flow" id="flow">
            <option id="sendmoney" value="sendmoney">A</option>
            <option id="sendmoneyp2p" value="sendmoneyp2p">Send Money P2P</option>
            <option id="sendmoneyservice">Send Money Service</option>
            <option id="econebay">Express Checkout - On eBay</option>
            <option id="ecoffebay">Express Checkout - Off eBay</option>
            <option id="gsp">Global Shipping Platform</option>
            <option id="pos">TouchStone POS</option>
            <option id="davisauthcapture">Davis Checkout - Auth &amp; Capture</option>
            <option id="davisfp">Davis Checkout - Forced Post</option>
          </select>


      <span id="sprytextfield1">
      <label>Stage Name
        <input type="text" name="stage" id="stage" />
        Buyer
      </label>
      <span class="textfieldRequiredMsg"></span>
      <label>
        <select name="buyer" id="buyer">
          <option>US</option>
          <option>UK</option>
          <option>CA</option>
          <option>FR</option>
          <option>DE</option>
          <option>AU</option>
        </select>
        Seller
      </label>
      <span class="textfieldRequiredMsg"></span>
      <label>
        <select name="buyer2" id="buyer2">
          <option>US</option>
          <option>UK</option>
          <option>CA</option>
          <option>FR</option>
          <option>DE</option>
          <option>AU</option>
        </select>
      </label>
      <label>
      <input name="SubmitID" type="submit" id="SubmitID" />
        <br />
        <br />
        Flow Description 
        <label for="Descrptn"></label>
        <textarea name="Descrptn" id="Descrptn" cols="45" rows="1"></textarea>
             <br />
        <br />
        <br />
        Output
        <textarea name="output" cols="45" rows="5" readonly="readonly" id="output">Output here</textarea>
        <br />
        <br /> 
        <div align="center">
        <input type="button" name="submitbutton" id="executebutton" value="Execute Flow" action="checkState()"/>

        <input type="button" name="submitbutton" id="submitbutton2" value="Contribute"/>
        </div>
        <br />
      </label>
      <span class="textfieldRequiredMsg"></span></span>
      </form>

---

true

和

false

是数据类型。不是字符串

document.getElementById("executebutton").disabled=true;
var button = document.getElementById("SubmitID");
function myfunc()
{
 document.getElementById("executebutton").disabled=false;
}

---

disabled

属性的工作方式与布尔值不同；如果一个元素有一个带有任何值的

disabled

属性，它将被禁用。要重新启用按钮，请删除禁用的属性：

document.getElementById("executebutton").removeAttribute('disabled');

---

好了，我自己测试一下。（）

您在哪里调用

myFunc（）

？我在任何地方都看不到删除布尔语的引号

document.getElementById("executebutton").removeAttribute('disabled');

document.getElementById("executebutton").disabled = true;
document.getElementById("SubmitID").onclick =  function() {
    document.getElementById("executebutton").disabled = false;
};