验证并提交Google云端硬盘表单

Question

我创建了一个表单，用于将文件上传到我的Google云端硬盘。

现在我需要验证并提交表单。所以我想验证输入第一个，然后提交，但我不能这样做。当点击“上传”时，两件事情同时发生。有人能帮助我吗？

HTML：

<div>
<form name= "myForm" id="myForm">
<label><b>Name</b></label>
<input id="id1" type="text" name="myName" placeholder="Name.." required />
<label><b>Email</b></label>
<input id="id1" type="email" name="myEmail" placeholder="Email.." required />
<label><b>Tel</b></label>
<input id="id1" type="tel" name="myTel" placeholder="Tel.." required />
<input id="id1" type="file" name="myFile" required />
<button id="button" onclick="myFunction();">Upload</button>
</form>
</div>
<div id="output"></div>

使用Javascript：

<script>

function myFunction() {
    var upload = this.value='Uploading..';
    google.script.run.withSuccessHandler(fileUploaded).uploadFiles(this.parentNode);    
    return false;
    var inpObj = document.getElementById("id1");
    if (inpObj.checkValidity() == false) {
        document.getElementById("button").innerHTML = inpObj.validationMessage; return; 
    } else {
        document.getElementById("button").innerHTML = upload; 
    } 
}

function fileUploaded(status) {
    document.getElementById('myForm').style.display = 'none';
    document.getElementById('output').innerHTML = status;
}

</script>

此外，这是Server.gs：

function doGet(e) {
    return HtmlService.createHtmlOutputFromFile('form.html');
}

function uploadFiles(form) {

    try {

        var dropbox = "Videos";
        var folder, folders = DriveApp.getFoldersByName(dropbox);

        if (folders.hasNext()) {
            folder = folders.next();
        } else {
            folder = DriveApp.createFolder(dropbox);
        }

        var blob = form.myFile;    
        var file = folder.createFile(blob);    
        file.setDescription("Uploaded by " + "|" + form.myName + "|" + form.myTitle + "|" + form.myEmail);

        return "Success.";

    } catch (error) {

        return error.toString();

    }

}