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Validating text in javascript

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At the end, there's a little exercise to keep you busy too!

Form validation is the process of checking that a form has been filled in correctly before it is processed.

Whether it’s filling in a contact form or entering profile details into a new application, handling input errors can be the difference between a good or a bad user experience.

Have you ever filled in a huge form online, only to submit it and find that there was an error so you have to start again? It is these kind of fundamental errors that stop people returning to your website.

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Here is a tutorial for building your own Javascript validation that you can use on any input on your website or web application.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.Shows you how to write a script that ensures your form is filled in correctly before it's sent to your server.Server-side validation is more secure but often more tricky to code, whereas client-side (Java Script) validation is easier to do and quicker too (the browser doesn't have to connect to the server to validate the form, so the user finds out instantly if they've missed out that required field! In this tutorial we'll build a simple form with client-side Java Script validation.You can then adapt this form to your own requirements.Syntactic validation should enforce correct syntax of structured fields (e.g.