javascript form validation||JS admin Panel integration||JS practical|JavaScript array||event object

Published: 19 May 2020
on channel: Khatore Classes

100

#javascript tutorial#javascripttutorialforbeginners #javascript #class10
#bank_PO #ssc_exam #ibps #pgtCOMPUTER # navodaya2020 #computerteacher #kvscomputerteacher #rajsthanpatwari #rajsthanconstable # rajasthanpatwari #RKCL #CBSE #RBSE
#coronavirus
#covid19
#stayathome
#website
#html
#FIRSTWEBSITE
#HANUMANKHATORE
#HANUMAN
#hanu_biotech

Do not forget to subscribe to Hanuman khator channel.

WHATSAPP NO 9828128420 FOR FREE COUNSELING IN sriganganagar

Computer classes | most 5 questions || BCA || BTech || MSc || MCA

New update 2020 PGT COMPUTER TEACHER

Operating system is linux
telnet in previous video
usenet in previous video
characterstics of computer in previous video
computer teacher vacancy in rajasthan 2020

Rajasthan patwari bharti 2020

What is computer how to subscribe
1. Open Youtube.
2. Type Hanuman khator.
3. Press the button of subscribe.

Patwari Vacancy
Constable Vacancy
Computer Teacher Vacancy
RKCL rscit

#COMPUTER
#RAJASTHAN COMPETITION

Whatsapp number 9828128420
For free counseling

Faculty qualification (MSc,MCA,Mtech
Net and JRF in CS) and 20 year EXP

Free counseling By Hanuman SIR in SriGanganagar(Raj)
JavaScript - JavaScript - Form Validation
________________________________________
Form validation normally used to occur at the server, after the client had entered all the necessary data and then pressed the Submit button. If the data entered by a client was incorrect or was simply missing, the server would have to send all the data back to the client and request that the form be resubmitted with correct information. This was really a lengthy process which used to put a lot of burden on the server.
JavaScript provides a way to validate form's data on the client's computer before sending it to the web server. Form validation generally performs two functions.
• Basic Validation − First of all, the form must be checked to make sure all the mandatory fields are filled in. It would require just a loop through each field in the form and check for data.
• Data Format Validation − Secondly, the data that is entered must be checked for correct form and value. Your code must include appropriate logic to test correctness of data.
Example
We will take an example to understand the process of validation. Here is a simple form in html format.
html
head
titleForm Validation/title
script type = "text/javascript"
!--
// Form validation code will come here.
//--
/script
/head

body
form action = "/cgi-bin/test.cgi" name = "myForm" onsubmit = "return(validate());"
table cellspacing = "2" cellpadding = "2" border = "1"

tr
td align = "right"Name/td
tdinput type = "text" name = "Name" //td
/tr

tr
td align = "right"EMail/td
tdinput type = "text" name = "EMail" //td
/tr

tr
td align = "right"Zip Code/td
tdinput type = "text" name = "Zip" //td
/tr

tr
td align = "right"Country/td
td
select name = "Country"
option value = "-1" selected[choose yours]/option
option value = "1"USA/option
option value = "2"UK/option
option value = "3"INDIA/option
/select
/td
/tr

tr
td align = "right"/td
tdinput type = "submit" value = "Submit" //td
/tr

/table
/form
/body
/html
Output
Basic Form Validation
First let us see how to do a basic form validation. In the above form, we are calling validate() to validate data when onsubmit event is occurring. The following code shows the implementation of this validate() function.
script type = "text/javascript"
!--
// Form validation code will come here.
function validate() {

if( document.myForm.Name.value == "" ) {
alert( "Please provide your name!" );
document.myForm.Name.focus() ;
return false;
}
if( document.myForm.EMail.value == "" ) {
alert( "Please provide your Email!" );
document.myForm.EMail.focus() ;
return false;
}
if( document.myForm.Zip.value == "" || isNaN( document.myForm.Zip.value ) ||
document.myForm.Zip.value.length != 5 ) {

alert( "Please provide a zip in the format #####." );
document.myForm.Zip.focus() ;
return false;
}
if( document.myForm.Country.value == "-1" ) {
alert( "Please provide your country!" );
return false;
}
return( true );
}
//--
/script

On this page of the site you can watch the video online javascript form validation||JS admin Panel integration||JS practical|JavaScript array||event object with a duration of hours minute second in good quality, which was uploaded by the user Khatore Classes 19 May 2020, share the link with friends and acquaintances, this video has already been watched 100 times on youtube and it was liked by 4 viewers. Enjoy your viewing!

363,581

4.8K