function verify() {
	

        if ( document.doc.first_name.value == ""||document.doc.last_name.value == "" )
        {
                alert ( "Please enter your first and last name" );
				document.doc.first_name.focus();
                return false;
        }
        if (document.doc.last_name.value == "" )
        {
                alert ( "Please enter your last name" );
				document.doc.last_name.focus();
                return false;
        }
		

        if ( document.doc.company.value == "" )
        {
                alert ( "Please enter your company name" );
				document.doc.company.focus();
                 return false;
        }
		
<!-- Changes:  Sandeep V. Tamhankar (stamhankar@hotmail.com) -->

/* 1.1.2: Fixed a bug where trailing . in e-mail address was passing
            (the bug is actually in the weak regexp engine of the browser; I
            simplified the regexps to make it work).
   1.1.1: Removed restriction that countries must be preceded by a domain,
            so abc@host.uk is now legal.  However, there's still the 
            restriction that an address must end in a two or three letter
            word.
     1.1: Rewrote most of the function to conform more closely to RFC 822.
     1.0: Original  */

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- Begin

/* The following pattern is used to check if the entered e-mail address
   fits the user@domain format.  It also is used to separate the username
   from the domain. */
var emailPat=/^(.+)@(.+)$/
/* The following string represents the pattern for matching all special
   characters.  We don't want to allow special characters in the address. 
   These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
/* The following string represents the range of characters allowed in a 
   username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
/* The following pattern applies if the "user" is a quoted string (in
   which case, there are no rules about which characters are allowed
   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
   is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
/* The following pattern applies for domains that are IP addresses,
   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
   e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
   non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
   For example, in john.doe@somewhere.com, john and doe are words.
   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* The following pattern describes the structure of a normal symbolic
   domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


/* Finally, let's start trying to figure out if the supplied address is
   valid. */

/* Begin with the coarse pattern to simply break up user@domain into
   different pieces that are easy to analyze. */
var matchArray=document.doc.email.value.match(emailPat)
if (matchArray==null) {
  /* Too many/few @'s or something; basically, this address doesn't
     even fit the general mould of a valid e-mail address. */
	alert("Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
    alert("The Email is invalid")
    return false
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
   host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Your E-mail Destination IP address is invalid!")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("Your E-mail is invalid")
    return false
}

/* domain name seems valid, but now make sure that it ends in a
   three-letter word (like com, edu, gov) or a two-letter word,
   representing country (uk, nl), and that there's a hostname preceding 
   the domain or country. */

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("Your E-mail address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="Your E-mail address is missing a hostname!"
   alert(errStr)
   return false
}
/*		if ( document.doc.mac.value == "" )
        {
                alert ( "Please enter your Mac Address" );
    			document.doc.mac.focus();
                 return false;
        }
*/

  /* check for freemail services // 20070709|jt */
  var domainPat=/(hotmail|yahoo|gmail|googlemail|gmx)\.[a-z]*/
  var domainArray=domain.match(domainPat)
  if(domainArray!=null) {
    alert("Please do not use anonymous email services.");
    document.doc.email.focus();
    return false;
  }
  

		if ( document.doc.phone.value == "" )
        {
                alert ( "Please enter your phone number" );
    			document.doc.phone.focus();
                 return false;
        }
		if ( document.doc.city.value == "" )
        {
                alert ( "Please enter your city" );
				document.doc.city.focus();
                 return false;
        }
				if ( document.doc.country.value == "" )
        {
                alert ( "Please enter your country" );
    			document.doc.country.focus();
                 return false;
        }

// additional stuff for the MAC address // 20070607|jt
      // check for value
      if (document.doc.mac.value == "") {
        alert("Please enter a MAC address.");
        document.doc.mac.focus();
        return false;
      }
      // check for length and correct notation
      if (document.doc.mac.value.length != 17 || document.doc.mac.value.indexOf("-") == -1) {
        alert("Please verify that your MAC address is correct.\ne.g. '00-18-AC-BD-B4-4A'");
        document.doc.mac.focus();
        return false;
      }
      else {
        // are there 'enough' dashes?
        dashcount = 0;
        dashpos = document.doc.mac.value.indexOf("-");
        while (dashpos != -1) {
           dashcount++;
           dashpos = document.doc.mac.value.indexOf("-",dashpos+1);
        }
        if (dashcount != 5) {
          alert("Please verify that your MAC address is correct.\ne.g. '00-18-AC-BD-B4-4A'");
          document.doc.mac.focus();
          return false;
        }
      }


  return true;

}