I have a dropdown selection list, and based on the selection, there are text fields that are hidden or displayed for more info.
The form will include one text field called "Your Name", and a button.
Our validation script will ensure that the user enters their name before the form is sent to the server. Try pressing the Send Details button without filling anything in the "Your Name" field.
Shows you how to write a script that ensures your form is filled in correctly before it's sent to your server.
Great for "required fields" such as email addresses!
Form validation is the process of checking that a form has been filled in correctly before it is processed.
For example, if your form has a box for the user to type their email address, you might want your form handler to check that they've filled in their address before you deal with the rest of the form.
This tutorial will show you how to create a Java Script-enabled form that checks whether a user has filled in the form correctly before it's sent to the server. First we'll explain why form validation is a useful thing, and then build up a simple example form, explaining things as we go along.
At the end, there's a little exercise to keep you busy too!
I know there are ways to do this with radio buttons and checkboxes, but can it be done with dropdowns as well? Could you please give me an example of how to check them one at a time and how to concatonate the errors if they exist? The name of my form is "my Form"I have not been able to find code anywhere that incorporates the 2 (That is, empty or alpha). might help: Rather than using alert()s for each field, just concatenate the error messages together into a string (separated by e.g.
The form is large so I didn't want to paste all here, but the snap shot of the items I'm referring to are: Is it possible to make the the text field with name=googlekey required if some selects Google Search in drop down..not required if they make some other selection? The name of the function is validate Form() for a solution to trapping the space being entered. I get my form to work with the validation, but everyone who first submits the form gets this error: "403 No variable substitutions in template"When you reload the page the form sends perfectly. "\n"), then display the final string in an alert box if valid == false. It has three fields which I want to validate but in testing it the first incident of validation causes the alert to pop up but then when I click OK on the alert it submits the form anyway without letting me complete the field and continue to the other fields.
There are two main methods for validating forms: (usually done using Java Script).