javascript - HTML/Javascript 代码不会验证表单

Question

我正在尝试验证表单中的文本框，但是当单击提交按钮并且所有框都为空时，所有代码都会继续前进，就像所有内容都正确填写一样，即使它没有正确填写。这是我用来验证文本框的代码

function validateAndEmail(){        
    if(document.channelForm.chanName.value == “”) {
        alert(“Please provide your channel name.”);
        Return false;
    }
    else if(document.channelForm.chanURL.value == “”) {
        alert(“Please provide your channel URL.”);
        Return false;
    }
    else if(document.channelForm.famName.value == “”) {
        alert(“Please provide your Family name.”);
        Return false;
    }
    else if(document.channelForm.firName.value == “”) {
        alert(“Please provide your First name.”);
        Return false;
    }
    else if(document.channelForm.email.value == “”) {
        alert(“Please provide your valid Email.”);
        Return false;
    }
    else if(document.channelForm.address.value == “”) {
        alert(“Please provide your Address.”);
        Return false;
    }
    else {
        alert("Everything is ok. Dont panic!") 
        Return true;
    }   
}

我已经使用显示“工作”的警报测试了此按钮，因此它肯定链接到代码，但是当我尝试使用 if 语句时，即使满足条件，它也不会运行该语句。如果您有经验的同事能给我任何帮助，我将不胜感激。

Answer 1

1. 将“”替换为“。
2. 将 Return 替换为 return 不带大写。
3. 更改您的文本编辑器。

有效函数:

function validateAndEmail() {
    var form = document.channelForm;
  console.log(form);
    if (form.chanName.value == "") {
        document.write("Please provide your channel name.");
        return false;
    } else if (form.chanURL.value == "") {
        document.write("Please provide your channel URL.");
        return false;
    } else if (form.famName.value == "") {
        document.write("Please provide your Family name.");
        return false;
    } else if (form.firName.value == "") {
        document.write("Please provide your First name.");
        return false;
    } else if (form.email.value == "") {
        document.write("Please provide your valid Email.");
        return false;
    } else if (form.address.value == "") {
        document.write("Please provide your Address.");
        return false;
    } else {
        document.write("Everything is ok. Dont panic!")
        return true;
    }
}

<form name="channelForm" onsubmit="validateAndEmail()">
  <input name="chanName"><br>
  <input name="chanURL"><br>
  <input name="famName"><br>
  <input name="firName"><br>
  <input name="email"><br>
  <input name="address"><br>
  
  
  <input type="submit" value="Ok" />
  
  
</form>