Cam fourums xxx - Validating text fields in javascript

Finally, the "Terms and Conditions" checkbox is validated.We want to the user to agree to our imaginary Terms and Conditions before they send the form, so we'll check to make sure they've clicked the checkbox: in any one of the above cases, if one or more of our checks fail, the form will not be sent to the server.

validating text fields in javascript-8

So if you select the second item in the drop down, a text field associated with that selection appears.

My issue is how to make that text field required, but only required based on drop down selection. I am writing a script that validates two select menus. I need to check that it is not "empty" and if not they are alpha characters with -, space and ' special characters and with a limit of 30 chars. @eyefly: I'm guessing you're using cgiemail to process your form on the server?

Our example is very simple as it only checks one field.

Let's expand this example with a more complex function that checks lots of form fields.

I have a registraion form setup with javascript validation in place, but there is one place I'm having trouble.

I have a dropdown selection list, and based on the selection, there are text fields that are hidden or displayed for more info.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.Thanks, David[Edited by catron on 16-Feb-11 ] im having trouble with my student registration form.you choose the subjects BSIT, BSMATH, BSED, BEED.year level will be limited until 4 year only while if course is BSCE, BSGE, BSArch it will limit until 5 year.. [code]if ( document.contact_form.contact_name.value == "" ) [code][]=space In your example if one enters [] [] [] it does not trap it. It can be found at; Matt, I find your site very helpful. Validation is working when I test the forms but I am getting emails with 1 or -1 in fields (instead of a valid phone or email, etc.) AND I am getting 20, 40, 80 at one time. I am an ms access guy and very new to javascript, I am trying an web application with php & mysql. Tablename : Table1Feilds : Name, Class, Checkbox Book1, Checkbox Book2 Example Data:- Name: gary Class: 1A jane 1A sree 1B rita 1B jai 1BValidation : Each class can only select not more than 2 of Book1 and 2 of Book2Please give me the code . I have tried to enter a 1 or -1 and it gives me the appropriate error message so I am not sure how I am getting these emails. One point to note about Java Script validation is that it can always be circumvented by the user disabling Java Script in their browser, so for secure validation you'll need to write your validating code in your server-side scripts.

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