function validation(){
	opt = "";
	name_is = 'name' + opt;
	email_is = 'email' + opt;
	phone_is = 'phone' + opt;
	
	name = document.getElementById(name_is).value;
	email = document.getElementById(email_is).value;
	phone = document.getElementById(phone_is).value;
	captcha= document.getElementById('captcha1').value;
	
	if(name == ''){
		alert("Please Enter your Name");
		document.getElementById(name_is).focus;
		return false;
	}
	
	if(email == ''){
		alert("Please Enter Your Email ID");	
		document.getElementById(email_is).focus;
		return false;
	}else{
			skipMsgs = false;
			emailStr = email;
		/* 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=emailStr.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. */
			if (skipMsgs!=true){
				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
			if (skipMsgs!=true){
				alert("The username doesn't seem to be valid.")
			}
			return false
		}
		
		//check for characters that are not allowed in email address
		 var iChars = "!$%^~&*()+=-[]\\\';,/{}|\":<>`?";
	
		  for (var i = 0; i < emailStr.length; i++)
			{
			if (iChars.indexOf(emailStr.charAt(i)) != -1)
			{
				if (skipMsgs!=true){
					alert("Email address doesn't seem to be valid.")
				}
				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) {
					if (skipMsgs!=true){
						alert("Destination IP address is invalid!")
					}
					return false
				}
			}
			return true
		}
		
		// Domain is symbolic name
		var domainArray=domain.match(domainPat)
		if (domainArray==null) {
			if (skipMsgs!=true){
				alert("The Domain Name doesn't seem to be valid.")
			}
			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.
			if (skipMsgs!=true){
			   alert("The 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) {
			if (skipMsgs!=true){
			   var errStr="This E-mail address is missing a hostname!";
			   alert(errStr);
			}
		   return false
		   }
		   // If we've gotten this far, everything's valid!
	}
	
	if(phone == ''){
		alert("Please Enter your Phone");
		document.getElementById(phone_is).focus;
		return false;
	}

	if(phone != ''){
		phonelength = phone.length;
		for(i=0;i<phonelength;i++){
			j=i+1;
			varphone = phone.substring(i,j);
			if(isNaN(varphone)){
				if(varphone != '-'){
					alert("Please Enter Numeric Value for Phone !");
					document.getElementById(phone_is).value = '';
					document.getElementById(phone_is).focus;
					return false;
				}
			}
		}
	}

	if(captcha== ''){
		alert("Please Enter Code Shown in Image");
		document.getElementById('captcha1').focus;
		return false;
	}
	return true;
}

function change_form(fvalue){
	if(fvalue == 'IT')	{
		document.getElementById('IT').style.display = 'block';
		document.getElementById('BPO').style.display = 'none';
		document.getElementById('KPO').style.display = 'none';
		document.getElementById('form_select').value = 'IT';
	}if(fvalue == 'BPO'){
		document.getElementById('IT').style.display = 'none';
		document.getElementById('BPO').style.display = 'block';
		document.getElementById('KPO').style.display = 'none';
		document.getElementById('form_select').value = 'BPO';
	}if(fvalue == 'KPO'){
		document.getElementById('IT').style.display = 'none';
		document.getElementById('BPO').style.display = 'none';
		document.getElementById('KPO').style.display = 'block';
		document.getElementById('form_select').value = 'KPO';
	}
}