Trim spaces from form input?

Question

Hello so i'm trying to trim the white spaces when the user enter spaces he get an error explaning that he should enter valid chars but if he used: ' test ' the same value is entered in the database do i need to trim that again in javascript ?

function validateForm()
{
    if(trim(document.insert.aname.value) ==="")
    {
      alert("Animal should have a name");
      document.insert.aname.focus();
      return false;
    }
}
function trim(value) {
    return value.replace(/^\s+|\s+$/g,"");
}

please can you help ? the input page is .JSP

Answer 1

You're not actually trimming the input. You want this:

//store the input in a variable
var nameInput = document.insert.aname

function validateForm() {
    //Get the trimmed name
    var animalName = trim(nameInput.value)

    if(animalName) {
        //Update the form with the trimmed value, just before the form is sent
        nameInput.value = animalName
    }
    else {
         //Trimmed value is empty
         alert("Animal should have a name");
         nameInput.focus();
         return false;
    }
}

function trim(value) {
    return value.replace(/^\s+|\s+$/g,"");
}