问题描述
我的代码如下:
<!doctype html>
< html lang =en>
< head>
< title>测试textarea< / title>
< style type =text / css>< / style>
< script type =text / javascriptsrc =validation.js>< / script>
< / head>
< body>
< div id =wrapper>
< span id =error_boxstyle =display:none;>< / span>
< form name =storyTellermethod =getaction =#onSubmit =return validateForm()>
< p class =title>
< label for =title> TITLE:< / label>
< input type =textid =titlename =titlerequired onBlur =validateTitle(title)/>
< / p>
< textarea name =entryid =entryrows =10cols =45onBlur =validateEntry(entry)>
< / textarea>
< input type =submitvalue =submit/>
< / form>
< / div>
< / body>
< / html>
validation.js的内容:
<$ p ($ title ='title')。value)){
document.getElementById(); $ p> function validateTitle(title){/ * validates the title * /
if(isNaN(document.getElementById ( '标题')style.background = #ccffcc;
document.getElementById('error_box')。style.display =none;
返回true;
}
else {
document.getElementById('error_box')。innerHTML ='请输入一个有效的标题';
document.getElementById('error_box')。style.display =block;
document.getElementById('title')。style.background =red;
返回false;
function validateEntry(entry){/ * validating the entry * /
var x = document.getElementById('entry')。value;
x = x.trim(); $(b)if((x ==)||(x == null)){
document.getElementById('entry')。style.background =red;
document.getElementById('error_box')。innerHTML ='你的故事在哪里';
document.getElementById('error_box')。style.display =block;
返回false;
}
else {
document.getElementById('entry')。style.background =#ccffcc;
document.getElementById('error_box')。innerHTML ='';
document.getELementById('error_box')。style.display =none;
返回true;
函数validateForm(){/ *验证表单* /
var error = 0;
if(!validateTitle('title')){
document.getElementById('error_box')。style.display =block;
错误++;
}
if(!validateEntry('entry')){
document.getElementById('error_box')。style.display =block;
错误++;
}
if(error> 0){
return false;
$ / code $ / pre
修改您的代码现在可以更好地用于提交和模糊事件。
在您的HTML源代码中,将 onblur
属性更改为 onblur =validateEntry(this)
然后你可以使用这个javascript:
function validateEntry(entry){/ * validating * /
var error_box = document.getElementById('error_box');
error_box.style.display =none;
if(entry.name ==title){// INPUT type =text
if(!isNaN(entry.value)){
error_box.innerHTML ='请输入一个有效的标题';
error_box.style.display =block;
entry.style.background =#fee;
返回false;
} else {
entry.style.background =#ccffcc;
返回true;
}
} else if(entry.name ==entry){// TEXTAREA
var x = entry.value.trim();
if((x ==)||(x == null)){
error_box.innerHTML ='您的故事在哪里?';
error_box.style.display =block;
entry.style.background =#fee;
返回false;
} else {
entry.style.background =#ccffcc;
返回true;
$ b函数validateForm(){/ *验证表单* /
var form = document.forms ['storyTeller'] ;
var error_box = document.getElementById('error_box');
var error = 0;
var error_msg ='';
if(!validateEntry(form ['title'])){
error ++;
error_msg + = error_box.innerHTML +'< br />';
}
if(!validateEntry(form ['entry'])){
error ++;
error_msg + = error_box.innerHTML;
}
if(error> 0){
error_box.innerHTML = error_msg;
error_box.style.display =block;
返回false;
} else {
error_box.style.display =none;
返回true;
}
}
My code follows:.
<!doctype html>
<html lang="en">
<head>
<title>Testing the textarea</title>
<style type="text/css"></style>
<script type="text/javascript" src="validation.js"></script>
</head>
<body>
<div id="wrapper">
<span id="error_box" style="display:none;"></span>
<form name="storyTeller" method="get" action="#" onSubmit="return validateForm()">
<p class="title">
<label for="title">TITLE:</label>
<input type="text" id="title" name="title" required onBlur="validateTitle(title)"/>
</p>
<textarea name="entry" id="entry" rows="10" cols="45" onBlur="validateEntry(entry)">
</textarea>
<input type="submit" value="submit" />
</form>
</div>
</body>
</html>
Content of validation.js:
function validateTitle(title){/*validating the title*/
if (isNaN(document.getElementById('title').value)){
document.getElementById('title').style.background="#ccffcc";
document.getElementById('error_box').style.display="none";
return true;
}
else{
document.getElementById('error_box').innerHTML='Please enter a valid title';
document.getElementById('error_box').style.display="block";
document.getElementById('title').style.background="red";
return false;
}
}
function validateEntry(entry){/*validating the entry*/
var x=document.getElementById('entry').value;
x = x.trim();
if((x=="")||(x==null)){
document.getElementById('entry').style.background="red";
document.getElementById('error_box').innerHTML = 'Where is your story';
document.getElementById('error_box').style.display="block";
return false;
}
else{
document.getElementById('entry').style.background="#ccffcc";
document.getElementById('error_box').innerHTML='';
document.getELementById('error_box').style.display="none";
return true;
}
}
function validateForm(){/*validating the form*/
var error = 0;
if(!validateTitle('title')){
document.getElementById('error_box').style.display="block";
error++;
}
if(!validateEntry('entry')){
document.getElementById('error_box').style.display="block";
error++;
}
if(error > 0){
return false;
}
}
Modified your code so now it works better for both submit and blur events.
In your HTML source change both onblur
attributes to onblur="validateEntry(this)"
and then you can use this javascript:
function validateEntry(entry) { /*validating*/
var error_box = document.getElementById('error_box');
error_box.style.display = "none";
if (entry.name == "title") { // INPUT type="text"
if (!isNaN(entry.value)) {
error_box.innerHTML = 'Please enter a valid title';
error_box.style.display = "block";
entry.style.background = "#fee";
return false;
} else {
entry.style.background = "#ccffcc";
return true;
}
} else if (entry.name == "entry") { // TEXTAREA
var x = entry.value.trim();
if ((x == "") || (x == null)) {
error_box.innerHTML = 'Where is your story?';
error_box.style.display = "block";
entry.style.background = "#fee";
return false;
} else {
entry.style.background = "#ccffcc";
return true;
}
}
}
function validateForm() { /*validating the form*/
var form = document.forms['storyTeller'];
var error_box = document.getElementById('error_box');
var error = 0;
var error_msg = '';
if (!validateEntry(form['title'])) {
error++;
error_msg += error_box.innerHTML + '<br/>';
}
if (!validateEntry(form['entry'])) {
error++;
error_msg += error_box.innerHTML;
}
if (error > 0) {
error_box.innerHTML = error_msg;
error_box.style.display = "block";
return false;
} else {
error_box.style.display = "none";
return true;
}
}
这篇关于即使表单无效,我的表单也会提交数据。但我的验证工作正常的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!