If I am defining a function in JavaScript at the top of my page that validates if the string entered in a form is (A-Z,a-z, or 0-9). And then I call that function when they submit it saying :
onsubmit="return Validator(this);"
If the function name is :
function Validator(form)
Why isn't it actually validating the string submitted when we actually click on submit, and is there a better way of validating forms?
Almost certainly because the Validator function is not written correctly… but since you haven't shown us what it looks like, we can't say specifically why.
Perhaps it is expecting a String and you are giving it an HTMLFormElement.
Lots of options for form validation. Depending on your framework, you may want to use Jquery's validation. If you go with yui, I have submitted a form validator that will be useful
Here is the gallery submission, from thee you can look at examples
An onsubmit handler function needs to return false to cancel the event (form submission) if you want to not submit and show a validation error message instead.
Plain Javascript approaches:
Form is still submitted even though listener function returns false
jQuery approaches:
How to not submit a form if validation is false
You aren't submitting a string to Validator, you are submitting an input element. So you would do if(form.element.value != "") ... or something... And yes there is a better way
