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try js ref_doc_getelementsbyClassName
"Uncaught TypeError: Cannot set property 'value' of null "
This HTML code
<input type="text" class="form-control" class="test" />
This JS code
function inputtest() {
document.getElementsByClassName('test').value = selectedControl;
}
Change your html:
<input type="text" class="form-control test" />
JS
function inputtest() {
document.getElementsByClassName('test')[0].value = selectedControl;
}
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I am trying to make a registration page for my website but when I run it; it gives error. What am I doing wrong?
<?php
//Form values
$name_value=$_POST['Name_input'];
$Username_value=$_POST['Username_input'];
$DOB_value=$_POST['DOB_input'];
$Password_value=$_POST['Password_input'];
$Phone_number_value=$_POST['Phone_number_input'];
$Python_checkbox_value=$_POST['Python_checkbox'];
$Java_checkbox_value=$_POST['Java_checkbox'];
$C_sharp_checkbox_value=$_POST['C#_checkbox'];
$HTML_checkbox_value=$_POST['HTML_checkbox'];
$Cpp_checkbox_value=$_POST['C++_checkbox'];
$R_checkbox_value=$_POST['R_checkbox'];
$swift_checkbox_value=$_POST['swift_checkbox'];
$kotlin_checkbox_value=$_POST['kotlin_checkbox'];
$JS_checkbox_value=$_POST['JS_checkbox'];
Take a look at this code :
<form method="GET">
<input type="checkbox" value="value" name="name">checkbox label</input>
<input type="submit">
</form>
<?php
if (isset($_GET["name"]))
{
echo $_GET["name"];
}
?>
As you can see when I submit the form without checking, the parameter in URI is empty because the checkbox isn't defined (I used GET method)
But when I check it, you can see the parameter is name=value
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Closed 1 year ago.
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I have this created a page with numbers and textbox in top of it as you see in the picture
The element id of the textbox is t1
the question is , what's the code I should write on click event to make the numbers written on the textbox .
For example , when I click (1) three times , the textbox should have the value of ( 111 )
any advices ?
JavaScript:
function display(val)
{
document.getElementById("t1").value+=val
}
HTML:
<input type="button" value="1" onclick="display('1')"/>
<input type="button" value="2" onclick="display('2')"/>
<input type="button" value="3" onclick="display('3')"/>
And so on..
display() will call the function to display the value what has been clicked.
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Closed 7 years ago.
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I want the following pattern in my Html text box : 500/600
i Have wriiten the following html code for it but its wrong
<input type="text" placeholder="eg: 500/600" name="txtShscpercent" pattern="[0-9]+\.[0-9]+[{\|\}]+[0-9]+" required></td>
can anyone help me with this
Whole numbers:
<input type="text" placeholder="eg: 500/600" name="txtShscpercent" pattern="\d+\/\d+" required>
Decimals:
<input type="text" placeholder="eg: 500/600" name="txtShscpercent" pattern="\d+(\.\d+)?\/\d+(\.\d+)?" required>
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<form name="home" action="" onsubmit="return Validateform();" method="post">
<input type="text" name="receiver" />
<input type="submit" value="send" name="send" />
</form>
What is the javascript to alert if the textbox does not start with 92 on submit?
I recommend you read a JavaScript tutorial. Try here.
To answer your question, this will probably work. If you're wondering why you're getting downvoted - asking people to write your code for you is generally considered bad form, so try not to do this in future. :)
function Validateform(e) {
if (document.getElementsByName('receiver')[0].value.substring(0, 2) !== "92") {
e.preventDefault();
alert("Alert");
}
}
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Closed 9 years ago.
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<form action="javascript:message();">
<input type="text" id="#msg" value='test'>
</form>
This is a simple form I made. Now when I call my JS function using this code it works (only one input can be accessed though):
function message() {
alert($('input').val());
}
But using this code doesn't work (alerts Undefined):
function message() {
alert($('#msg').val());
}
I have really no clue what to do and I have been looking for hours...
The value of the id attribute shouldn't start with a #:
<form action="javascript:message();">
<input type="text" id="msg" value='test'>
</form>
Here's the fiddle: http://jsfiddle.net/XrJjU/
If, for whatever reason, there is a # in the id, you'll have to escape it in your selector:
$('#\\#msg').val();
Here's the fiddle: http://jsfiddle.net/7P5ER/