Question

我的表单不会发送电子邮件，我认为我缺少if / elseif和return语句，但不确定在哪里插入

试图弄清楚在代码中插入return true / false语句的位置，并且代码确实为此使用了一些帮助，因为我仍然是Java脚本/ Web开发的初学者。

  var message, x, j;
  message = document.getElementById("message");
  message.innerHTML == "";
  x = document.getElementById("Firstname").value;
  try {

        if(x == "")  throw "Required Field";
        if (x = /^[a-zA-Z]*$/) throw "";
        if (x = /^[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]*$/) throw "Invalid Characters Present";
        if (x = Number(x)) throw "Invalid Characters Present";
  }
  catch(err) {
    message.innerHTML = err;
  } 
}

多数民众赞成在上面的第一个功能，以验证第一个输入



function myFunction2() {
  var message, x, j;
  message = document.getElementById("message2");
  message.innerHTML == "";
  x = document.getElementById("Lastname").value;
  try {
        if(x == "")  throw "Required Field";
        if (x = /^[a-zA-Z]*$/) throw "";
        if (x = /^[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]*$/) throw "Invalid Characters Present";
        if (x = Number(x)) throw "Invalid Characters Present";
  }
  catch(err) {
    message.innerHTML = err;
  }
}


function myFunction3  (){
  let message, x, j; //using let stops other functions from accidentally using it
   let RegExp = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/; //pattern for email
   message = document.getElementById("message3"); //getting the error element
   message.innerHTML == ""; //declaring default value
   x = document.getElementById("Email").value; //x equals the email value

try{ //trying the conditions
   if (x === '') throw "Required Field"; //if x is blank then throw and error message
   else if (RegExp.test(x)) throw ''; //if the regexp testing pattern is valid then throw null
   else throw "Invalid Email Address"; //otherwise throw value is not valid
 }
 catch(err) { //this cathces the throw and produces the error message
   message.innerHTML = err;
 }
}



function myFunction4() {
  var message, x, j;
  message = document.getElementById("message4");
  message.innerHTML == "";
  x = document.getElementById("Subject").value;
  try {

    if(x == "")  throw "Required Field";
    if (x = /^[a-zA-Z]*$/) throw "";
  }
  catch(err) {
    message.innerHTML = err;
  }
}

function myFunction5() {
  var message, x, j;
  message = document.getElementById("message5");
  message.innerHTML == "";
  x = document.getElementById("Message").value;
  try {
    if(x == "")  throw "Required Field";
  if (x = /^[a-zA-Z]*$/) throw "";

  }
  catch(err) {
    message.innerHTML = err;
  }
}

Answer 1

首先，我可以确定您的正则表达式是否需要正确设置语句的格式。

请参见here

例如

var phoneRE = /^\(\d\d\d\) \d\d\d-\d\d\d\d$/; 
  if (phoneNo.match(phoneRE)) {
    return true; 
  } else {
    alert( "The phone number entered is invalid!" );
    return false;
  }

无法验证表单以发送电子邮件

1 个答案: