Javascript表单验证程序函数工作不正常
我已经试着让这个函数工作了两个小时了,但是找不到错误所在 这是出乎意料的行为 当填写表单中的任何字段时,表单将发布到php文件, 并且仅当所有字段均为空时显示错误(如预期),即5个错误 但是,当这6个字段中的任何一个被填写时,不管表单中是否有其他错误,表单都会被过账 请帮我验证一下这张表格Javascript表单验证程序函数工作不正常,javascript,forms,function,validation,Javascript,Forms,Function,Validation,我已经试着让这个函数工作了两个小时了,但是找不到错误所在 这是出乎意料的行为 当填写表单中的任何字段时,表单将发布到php文件, 并且仅当所有字段均为空时显示错误(如预期),即5个错误 但是,当这6个字段中的任何一个被填写时,不管表单中是否有其他错误,表单都会被过账 请帮我验证一下这张表格 error是我将向用户显示的错误信息。 errors是找到的错误数 JavaScript函数 function formValidator(){ var elementValue = documen
error
是我将向用户显示的错误信息。
errors
是找到的错误数
JavaScript函数
function formValidator(){
var elementValue = document.getElementById("first-name").value;
var elementName = document.getElementById("first-name");
var errors = 0;
var error = " ";
if (elementValue == "" || elementValue == " " || elementValue== NULL){
error = "First Name shouldn't be left empty.";
errors = 1;
}
var elementValue = document.getElementById("last-name").value;
var elementName = document.getElementById("last-name");
if (elementValue == "" || elementValue == " " || elementValue== NULL){
if (errors == 0){
error = "Last Name shouldn't be left empty.";
}
else{
error += "<br>Last Name shouldn't be left empty.";
}
errors+=1;
}
var elementValue = document.getElementById("email-for-registration").value;
var elementName = document.getElementById("email-for-registration");
var email_err = "false";
if (elementValue == "" || elementValue == " " || elementValue== NULL){
email_err = "true";
}
var elementValue = document.getElementById("phone-for-registration").value;
if ((elementValue == "" || elementValue == " " || elementValue== NULL) && email_err == "true"){
if (errors == 0){
error = "Both email and contact cannot be left empty.";
}
else{
error += "<br>Both email and contact cannot be left empty.";
}
errors+=1;
}
var elementValue = document.getElementById("password-for-registration").value;
var elementName = document.getElementById("password-for-registration");
if (elementValue == "" || elementValue == " " || elementValue== NULL){
if (errors == 0){
error = "Password shouldn't be left empty.\nSelect a strong password atleast 6 characters long.";
}
else{
error += "<br>Password shouldn't be left empty.Select a strong password atleast 6 characters long.";
}
errors+=1;
}
else if (elementValue.length<6){
if (errors == 0){
error = "Password less than 6 characters aren't allowed for security reasons.";
}
else{
error += "<br>Password less than 6 characters aren't allowed for security reasons.";
}
errors+=1;
}
email_err = document.getElementById("confirm-password-for-registration").value;
var elementName = document.getElementById("confirm-password-for-registration");
if (elementValue != email_err){
if (errors == 0){
error = "The password to confirm doesn't match with your desired password.";
}
else{
error += "<br>The password to confirm doesn't match with your desired password.";
}
errors+=1;
}
var elementValue = document.getElementById("agreed-for-registration");
var elementName = document.getElementById("agreed-for-registration");
if (!elementValue.checked){
if (errors == 0){
error = "Please go through our <a href=''>Terms and Conditions</a>, and make sure you agree to continue.";
document.getElementById("agreed-for-registration").focus();
}
else{
error += "<br>Please go through our <a href=''>Terms and Conditions</a>, and make sure you agree to continue.";
}
errors+=1;
}
alert(errors);
if (errors > 1){
document.getElementById("form_errors").innerHTML = "<h4 style='color:red;'>Please remove the following errors from form to continue.</h4>";
document.getElementById("form_errors").innerHTML += "<h5>" + error + "</h5><br>";
return false;
} else if (errors == 1){
alert(error);
elementName.focus();
return false;
} else if (errors == 0){
return true;
}
return false;
}
函数formValidator(){
var elementValue=document.getElementById(“名字”).value;
var elementName=document.getElementById(“名字”);
var误差=0;
var误差=”;
if(elementValue==“”| | elementValue==“”| | elementValue==NULL){
error=“First Name不应为空。”;
误差=1;
}
var elementValue=document.getElementById(“姓氏”).value;
var elementName=document.getElementById(“姓氏”);
if(elementValue==“”| | elementValue==“”| | elementValue==NULL){
如果(错误==0){
error=“姓氏不应为空。”;
}
否则{
错误+=“
姓氏不应为空。”;
}
误差+=1;
}
var elementValue=document.getElementById(“注册电子邮件”).value;
var elementName=document.getElementById(“注册电子邮件”);
var email_err=“false”;
if(elementValue==“”| | elementValue==“”| | elementValue==NULL){
电子邮件\u err=“true”;
}
var elementValue=document.getElementById(“注册电话”).value;
if((elementValue==“”| | elementValue==“”| | elementValue==NULL)和&email_err==true){
如果(错误==0){
error=“电子邮件和联系人都不能为空。”;
}
否则{
错误+=“
电子邮件和联系人不能为空。”;
}
误差+=1;
}
var elementValue=document.getElementById(“注册密码”).value;
var elementName=document.getElementById(“注册密码”);
if(elementValue==“”| | elementValue==“”| | elementValue==NULL){
如果(错误==0){
error=“密码不应为空。\n请选择至少6个字符长的强密码。”;
}
否则{
错误+=“
密码不应为空。请选择至少6个字符长的强密码。”;
}
误差+=1;
}
else if(elementValue.length 1){
document.getElementById(“表单错误”).innerHTML=“请从表单中删除以下错误以继续。”;
document.getElementById(“form_errors”).innerHTML+=“”+error+“
”;
返回false;
}else if(错误==1){
警报(错误);
elementName.focus();
返回false;
}else if(错误==0){
返回true;
}
返回false;
}
函数在这里调用
<form name="registration" class="deco_blu_form" action="<?=$base_url;?>forms/confirm-registration/members.php" method="post" onsubmit="return formValidator();">
首先,我计算以下字段:
名字
姓
注册电邮
登记电话
注册密码
确认注册密码
同意注册
以防万一,若你们用绝对值做某事
我构建了一个小型的概念验证脚本,并且遇到了这样一个问题:如果没有id为form#u错误的元素,那么这个脚本就无法工作。这可能是你的问题吗?这样,调用document.getElementById(“form\u errors”)
将导致未定义,并且函数不会返回false
对未定义元素的相同检查当然也适用于其他字段;)
您需要有elementValue==“NULL”
或elementValue==NULL
我将console.log
而不是alert和onblur
触发器放在控制台上,以便于调试
因此,完整的代码是:
function formValidator() {
var elementValue = document.getElementById("first-name").value;
var elementName = document.getElementById("first-name");
var errors = 0;
var error = " ";
if (elementValue == "" || elementValue == " " || elementValue === "NULL") {
error = "First Name shouldn't be left empty.";
errors = 1;
}
var elementValue = document.getElementById("last-name").value;
var elementName = document.getElementById("last-name");
if (elementValue == "" || elementValue == " " || elementValue === "NULL") {
if (errors == 0) {
error = "Last Name shouldn't be left empty.";
} else {
error += "<br>Last Name shouldn't be left empty.";
}
errors += 1;
}
var elementValue = document.getElementById("email-for-registration").value;
var elementName = document.getElementById("email-for-registration");
var email_err = "false";
if (elementValue == "" || elementValue == " " || elementValue === "NULL") {
email_err = "true";
}
var elementValue = document.getElementById("phone-for-registration").value;
if ((elementValue == "" || elementValue == " " || elementValue === "NULL") && email_err == "true") {
if (errors == 0) {
error = "Both email and contact cannot be left empty.";
} else {
error += "<br>Both email and contact cannot be left empty.";
}
errors += 1;
}
var elementValue = document.getElementById("password-for-registration").value;
var elementName = document.getElementById("password-for-registration");
if (elementValue == "" || elementValue == " " || elementValue === "NULL") {
if (errors == 0) {
error = "Password shouldn't be left empty.\nSelect a strong password atleast 6 characters long.";
} else {
error += "<br>Password shouldn't be left empty.Select a strong password atleast 6 characters long.";
}
errors += 1;
} else if (elementValue.length < 6) {
if (errors == 0) {
error = "Password less than 6 characters aren't allowed for security reasons.";
} else {
error += "<br>Password less than 6 characters aren't allowed for security reasons.";
}
errors += 1;
}
email_err = document.getElementById("confirm-password-for-registration").value;
var elementName = document.getElementById("confirm-password-for-registration");
if (elementValue != email_err) {
if (errors == 0) {
error = "The password to confirm doesn't match with your desired password.";
} else {
error += "<br>The password to confirm doesn't match with your desired password.";
}
errors += 1;
}
var elementValue = document.getElementById("agreed-for-registration");
var elementName = document.getElementById("agreed-for-registration");
if (!elementValue.checked) {
if (errors == 0) {
error = "Please go through our <a href=''>Terms and Conditions</a>, and make sure you agree to continue.";
document.getElementById("agreed-for-registration").focus();
} else {
error += "<br>Please go through our <a href=''>Terms and Conditions</a>, and make sure you agree to continue.";
}
errors += 1;
}
console.log(errors)
if (errors > 1) {
document.getElementById("form_errors").innerHTML = "<h4 style='color:red;'>Please remove the following errors from form to continue.</h4>";
document.getElementById("form_errors").innerHTML += "<h5>" + error + "</h5><br>";
return false;
} else if (errors == 1) {
alert(error);
elementName.focus();
return false;
} else if (errors == 0) {
return true;
}
return false;
}
函数formValidator(){
var elementValue=document.getElementById(“名字”).value;
var elementName=document.getElementById(“名字”);
var误差=0;
var误差=”;
if(elementValue==“”| | elementValue==“”| | elementValue===“NULL”){
error=“First Name不应为空。”;
误差=1;
}
var elementValue=document.getElementById(“姓氏”).value;
var elementName=document.getElementById(“姓氏”);
if(elementValue==“”| | elementValue==“”| | elementValue===“NULL”){
如果(错误==0){
error=“姓氏不应为空。”;
}否则{
错误+=“
姓氏不应为空。”;
}
误差+=1;
}
var elementValue=document.getElementById(“注册电子邮件”).value;
var elementName=document.getElementById(“注册电子邮件”);
var email_err=“false”;
if(elementValue==“”| | elementValue==“”| | elementValue===“NULL”){
电子邮件\u err=“true”;
}
var elementValue=document.getElementById(“注册电话”).value;
如果((elementValue==“”| | elementValue==“”| | elementValue==“NULL”)&电子邮件错误==“true”){
如果(错误==0){
error=“电子邮件和联系人都不能为空。”;
}否则{
错误+=“
电子邮件和联系人不能为空。”;
}
误差+=1;
}
var elementValue=document.getElementById(“注册密码”).value;
var elementName=document.getElementById(“注册密码”);
if(elementValue==“”| | elementValue==“”| | elementValue===“NULL”){
如果(错误==0){
error=“密码不应为空。\n请选择至少6个字符长的强密码。”;
}否则{
错误+=“
密码不应为空。请选择至少6个强密码