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Sample Javascript for Web Form Field Validation

Below is a sample javascript for Web Form Field Validation

<script type=”text/javascript”>

function validateForm() {
if (validateFormElements() == true) {
return lm_SubmitWebForm();
} else {
return false;
}
}
function validateFormElements() {
// check radio button fields for FIELDNAME are not blank
if (( frm.FIELDNAME[0].checked == false ) && ( frm.FIELDNAME[1].checked == false ))
{
alert(“Please select a location.”);
return false;
}
if (document.frm.first_name.value == ”) {
alert(“Please enter your first name.”);
document.frm.first_name.focus();
return false;
}
if (document.frm.last_name.value == ”) {
alert(“Please enter your last name.”);
document.frm.last_name.focus();
return false;
}
if (document.frm.Company.value == ”) {
alert(“Please enter your company name.”);
document.frm.Company.focus();
return false;
}
if (document.frm.Title.value == ”) {
alert(“Please enter your title.”);
document.frm.Title.focus();
return false;
}
if (document.frm.Phone.value == ”) {
alert(“Please enter your phone number.”);
document.frm.Phone.focus();
return false;
}
if (document.frm.Email.value == ”) {
alert(“Please enter your email address.”);
document.frm.Email.focus();
return false;
}
// check email address format
var rx = /^[\w\.-]+@[\w\.-]+\.\w+$/i;
if (!rx.test(document.frm.Email.value)) {
alert(“The format of your email address is incorrect. Please re-enter.”);
document.frm.Email.focus();
return false;
}
return true;
}
</script>
<!– checkbox validation code –>

// check Agree Checkbox is not blank
if (frm.FIELDNAME.checked == false)
{
alert(“You need to put a checkmark in the box.”);
return false;
}

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