// JavaScript Document                  
<!--
// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "-";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}
function ValidateForm(){
	var occupation=document.form1.occupation
	var firstname=document.form1.firstname
	var lastname=document.form1.lastname
	var address=document.form1.address
	var address2=document.form1.address2
	var city=document.form1.city
	var state=document.form1.state
	var email1=document.form1.email1
	var email2=document.form1.email2
	var comments=document.form1.comments
	
	if((occupation.value==null)||(occupation.value==""))
	{
		alert("Please select an occupation")
		occupation.focus()
		return false
	}
	
	if((firstname.value==null)||(firstname.value==""))
	{
		alert("Please enter your first name")
		firstname.focus()
		return false
	}
	if((lastname.value==null)||(lastname.value==""))
	{
		alert("Please enter your last name")
		lastname.focus()
		return false
	}
	if ((email1.value==null)||(email1.value=="")){
		alert("Please enter a valid email address")
		email1.focus()
		return false
	}
	if (echeck(email1.value)==false){
		email1.value=""
		email1.focus()
		return false
	}
	if ((email2.value==null)||(email2.value=="")){
		alert("Please confirm your email address")
		email2.focus()
		return false
	}
	if (email2.value != email1.value) {
		alert ("Email addresses do not match");
		email1.value=""
		email2.value=""
		email1.focus()
		return false
	}
	if((comm.value==null)||(comm.value==""))
	{
		alert("Please enter your comments")
		comm.focus()
		return false
	}
	return true
 }
//-->