你可以通过这个简单但令人难以置信的问题来感谢你。
我有一个联系表单，用户点击提交，将运行一个强大的错误检查功能我自己硬编码。错误检查将在每个表单元素周围显示红色边框，该表单元素未通过验证测试，然后弹出警告，告知用户错误位置的详细列表以及错误的位置。这一切都正常，除了每个表单元素的边框设置为红色。它工作了一瞬间，足够让你看到，然后奇怪地恢复到原始的边框颜色。地球上到底发生了什么？就好像还有其他东西覆盖了这段代码???
发现了另一个问题
我也刚刚发现，当所有布尔检查变量都为真时，它不会像预期的那样提醒用户。我甚至运行了这个alert(fnameCheck + ", " + lnameCheck + ", " + emailCheck + ", " + topicCheck + ", " + messageCheck + ", " + termsAndConsCheck);并且警报没有显示出来。这里有一些事情......我不认为这是那个功能。我可能是错的，但我在其他地方使用过这个函数并且它有效（尽管它有较少的布尔变量来检查）
这是代码......
<div class="body" style="height:560px"> <!-- This is the body --><br />
<span style="font-size:50px">Contact Us</span><br />
<div style="margin-left:20px; text-align:left">
Please feel free to enter your details below to contact us.<br />
<span style="font-size:14px; color:grey">* = required field</span><br /><br />
<form name="contactForm"> <!-- This is a form -->
First name*:<br />
<input name="fname" type="text"><br />
Last name*:<br />
<input name="lname" type="text"><br />
Email*: <br /><input name="email" type="text"><br /><br />
My comment/ enquiry concerns*:<br />
<select id="topic">
<option value="Select a topic" selected>Select a topic</option>
<option value="Billing Questions">Billing Questions</option>
<option value="Returns/ Exchanges">Returns/ Exchanges</option>
<option value="Website Enquiries">Website Enquiries</option>
<option value="Product Enquiries">Product Enquiries</option>
<option value="Other">Other</option>
</select><br /><br />
Message*:<br /><textarea id="message"></textarea>
<br /><br />
If you'd like to send us a file, you may do so below but ensure that the file is no larger than 50MB.
<br /><input type="file" name="myFile">
<br><br />
You agree to the Privacy Policy (click to confirm)*.
<input name="tandc" type= "checkbox"><br /><br />
<button onclick="submitForm()">Hi</button>
<input type="reset" value="Reset">
</form>
</div>
</div>
以下是所有Javascript（所有这些内容都不相关，但此处可能还有其他内容导致此问题）
<script>
document.getElementById("cover").style.display = "none";
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
var username="";
function checkCookie() {
username = getCookie("username");
if (username != "") {
document.getElementById("topnavbar").innerHTML = "Welcome, " + username + ". | ";
}
}
checkCookie();
/* THIS IS THE RELEVANT STUFF FROM HERE DOWN TO THE NEXT COMMENT */
var topic = "Select a topic";
document.getElementById('topic').addEventListener("change", function() {
switch(this.value){
case "Select a topic":
topic = "Select a topic"
break;
case "Billing Questions":
topic = "Billing Questions"
break;
case "Returns/ Exchanges":
topic = "Returns/ Exchanges"
break;
case "Website Enquiries":
topic = "Website Enquiries"
break;
case "Product Enquiries":
topic = "Product Enquiries"
break;
case "Other":
topic = "Other"
break;
}
});
function submitForm(){
var firstName = contactForm.fname.value;
var lastName = contactForm.lname.value;
var email = contactForm.email.value;
var message = contactForm.message.value;
var fnameCheck = false;
var lnameCheck = false;
var emailCheck = false;
var topicCheck = false;
var messageCheck = false;
var termsAndConsCheck = false;
var errorMsg = "";
if(isNaN(firstName)&&firstName!=""){
fnameCheck = true;
}else{
fnameCheck = false;
if(fnameCheck == ""){
errorMsg += "First Name - The field is empty \n";
}else{
errorMsg += "First Name - Please ensure it contains no numbers or symbols \n";
}
}
if(isNaN(lastName)&&lasttName!=""){
lnameCheck = true;
}else{
lnameCheck = false;
if(lnameCheck == ""){
errorMsg += "Last Name - The field is empty \n";
}else{
errorMsg += "Last Name - Please ensure it contains no numbers or symbols \n";
}
}
if(email.indexOf("@") == -1 || email == ""){
emailCheck == false;
if(email == ""){
errorMsg += "Email - The field is empty \n";
}else{
errorMsg += "Email - This is not a valid email address\n";
}
}else{
emailCheck = true;
}
if(topic == "Select a topic"){
topicCheck = false;
errorMsg += "Topic - Please select a topic \n";
}else{
topicCheck = true;
}
if(message == ""){
messageCheck = false;
errorMsg += "Message - Please enter a message \n";
}else{
messageCheck = true;
}
if(!contactForm.tandc.selected){
termsAndConsCheck = false;
errorMsg += "Terms and Conditions - Please tick the checkbox \n";
}else{
termsAndConsCheck = true;
}
if(fnameCheck && lnameCheck && emailCheck && topicCheck && messageCheck && termsAndConsCheck){
alert("form submitted!");
}else{
if(!fnameCheck){
contactForm.fname.style.borderColor = "red";
}
if(!lnameCheck){
contactForm.lname.style.borderColor = "red";
}
if(!emailCheck){
contactForm.email.style.borderColor = "red";
}
if(!topicCheck){
document.getElementById("topic").style.borderColor = "red";
}
if(!messageCheck){
contactForm.message.style.borderColor = "red";
}
if(!termsAndConsCheck){
contactForm.tandc.style.outline = "1px solid red";
}
alert("Please fix the fields listed below... \n\n" + errorMsg + "\nThank you.");
}
}
/* THIS IS THE END OF THE RELEVANT CODE */
</script>
<script type="text/javascript" src="./jquery-2.1.4.min.js"></script>
<script>
$(document).ready(function() {
$("#slider").animate({
"left": $(".item:first").position().left + "px",
"width": $(".item:first").width() + "px"
}, 0);
$(".item").hover(function() {
$("#slider").stop();
$("#slider").animate({
"left": $(this).position().left + "px",
"width": $(this).width() + "px"
}, 500);
});
$(".item").on("mouseout", function() {
$("#slider").stop();
$("#slider").animate({
"left": $('#four').position().left + "px",
"width": $('#four').width() + "px"
}, 500);
});
});
</script>
答案 0 :(得分：1)
我需要做的就是更改行
<button onclick="submitForm()">Hi</button>
到
<button type="button" onclick="submitForm()">Submit</button>
感谢大家的帮助!!!
答案 1 :(得分：0)
我觉得它在工作，但如果有错误，你不会阻止表单提交。突出显示正在发生，弹出消息框，但随后表单提交，您将丢失所有内容。
将按钮更改为：
<button type="button" onclick="submitForm()">Hi</button>