Simple but Friendly Form validation

First Name*:
Last Name*:
E-Mail*:
Cell #:

script being used

1. Add onsubmit to form tag like this:
<form name="reg" onsubmit="return validate(this);">

2. Then add this script modifiy to your needs

<script type="text/javascript">
/**
 validate the form being passed
 return false if errors exist
 return true if no errors
*/
function validate(_f){
 // init errors to empty
 var errors = "";
 
 // check form inputs adding appropriate messages for each field
 if (!_f.fName.value.length)
  errors += "First Name\n";
 
 if (!_f.lName.value.length)
  errors += "Last Name\n";

 if (!_f.eMail.value.length)
  errors += "E-Mail\n";
 
 // if errors have been added, alert the user
 if (errors.length){
  // prepend a freindly error message
  errors = "Please correct the following:\n\n" + errors;
  
  alert (errors);
  // if errors exist return false
  return false;
 }
 
 // if no errors return true
 return true;
}
</script>