// Javascript Code Copyright Ranson's Scripts 2002

// To use the function/s below, place the tag below in the head of your HTML document.
// <SCRIPT LANGUAGE="JAVASCRIPT" SRC="formvalidate.js"></SCRIPT>

// The form must be named "Ray"  Case Sensitive
// <Form Name="Ray" Method=Post Action="script_name.pl">

// field names are case sensitive, must match required names exactly.
// in the VALUE use a comma between all required fields
// to validate an Email Address, the field name="" must contain the word "email"
// ie emailaddress - email - emailadd - etc.

// in the "Submit" tag, use the following code - onclick="return ValidateForm(this.form);"

// If using in a perl script, be sure to place a backslash before any existing
// backslash and place a backslash in front of any dollar sign
//     \\n <- double backslash     \$  <- single backslash


// this function will validate all fields on the form
// all fields must be filled in by the user.
// to validate an Email Address, the field name="" must contain the word "email"
// ie - emailaddress, email, emailadd, etc. Not case sensitive.
// in the "Submit" tag, use the following code - onclick="return ValidateAll(this.form);"
function ValidateAll() {
var EmailTest = /email/i;
for (i=0;i<document.forms[0].elements.length; i++) {
var found = (document.forms[0].elements[i].value);
var FormName = document.forms[0].elements[i].name;
var TstEmail = EmailTest.test(FormName);
if (TstEmail){ValidateEmail();}
	if(!found) {
alert('The "' +FormName+ '" field is required.\n Please enter your '+FormName);
document.forms[0].elements[i].focus();
return false;
  }
 }
function ValidateEmail() {
var format=/^[^@]+@([-\w]+\.)+[A-Za-z]{2,4}$/;
if(found.search(format) == -1){
alert("Your Email Address " +found+ " is not formatted correctly.");
document.forms[0].elements[i].focus();
return false;
  }
 }
}

                       // ### *** :) *** ### //

// Usage:  <input type=text name="phone" size=10 OnBlur="ValidateUSPhone(this.value);">
function ValidateUSPhone(Num) {
MyExp = /\W/g;
PhoneNum = Num.replace(MyExp, "");
if(PhoneNum.length != 10){
alert("Your Phone Number "+PhoneNum+" is incorrect. \n Please re-enter your phone number including area code.");
return false;
 }
}                       // ### *** :) *** ### //


# Works for PHP 

# could not use double quotes. + sign was giving trouble.


function ValidateAll() {
var EmailTest = /email/i;
for (i=0;i<document.nu.elements.length; i++) {
var found = (document.nu.elements[i].value);
var FormName = document.nu.elements[i].name;
var TstEmail = EmailTest.test(FormName);
if (TstEmail){ValidateEmail();}
	if(!found) {
alert('All Fields are Required on this form');
document.nu.elements[i].focus();
return false;
  }
 }
function ValidateEmail() {
var format=/^[^@]+@([-\w]+\.)+[A-Za-z]{2,4}$/;
if(found.search(format) == -1){
alert('Your Email Address is not formatted correctly.');
document.nu.elements[i].focus();
return false;
  }
 }
}

<Input type=SUBMIT onclick='return ValidateAll(this.form);'>