function isEmail(emailStr1)
{
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

	var matchArray=emailStr1.match(emailPat)
	if (matchArray==null) {
		alert("Email address seems incorrect (check @ and .'s)")		
		return false;
	}
	
	var user=matchArray[1]
	var domain=matchArray[2]
	if (user.match(userPat)==null) {
		alert("The user name doesn't seem to be valid.")
		return false;
	}

	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		  for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Destination IP address is invalid!")
				return false;
			}
		}	    
		return true
	}

	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		alert("The domain name doesn't seem to be valid.")
		return false;
	}

	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) {
	   alert("The address must end in a three-letter domain, or two letter country.")
	   return false;
	}

	if (len<2) 
	{
	   var errStr="This address is missing a hostname!"
	   alert(errStr)
	   return false;
	}	
	return true;
}

function RequestValidation()
{
	function IsNumeric(sText)
	{
		var ValidChars = "0123456789 ";
		var IsNumber=true;
		var Char;
		for (i = 0; i < sText.length && IsNumber == true; i++) 
		{ 
			Char = sText.charAt(i); 
			if (ValidChars.indexOf(Char) == -1) 
			{
				IsNumber = false;
			}
		}
		return IsNumber;
	}

	function IsCharacter(sText)
	{
		var ValidChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz. ";
		var IsNumber=true;
		var Char;
		for (i = 0; i < sText.length && IsNumber == true; i++) 
		{ 
			Char = sText.charAt(i); 
			if (ValidChars.indexOf(Char) == -1) 
			{
				IsNumber = false;
			}
		}
		return IsNumber;
	}

	//var Mobile		=	document.contact_us.mobile.value;
	//var Phone		=	document.contact_us.phone.value;
	var Your_Name		=	document.friend_form.your_name.value;
	var Friend_Name		=	document.friend_form.friend_name.value;
	//var PostalCode	=	document.contact_us.postal_code.value;
	
	
	if (document.friend_form.your_name.value=='')
	{
		alert("Please enter your name. ");
		document.friend_form.your_name.focus();
		return false;
	}
	if(IsCharacter(Your_Name)==false)
	{
		alert("Please enter a valid name.");
		document.friend_form.your_name.focus();
		return false;
	}
	if (document.friend_form.your_email.value=='')
	{
		alert("Please enter your email id.");
		document.friend_form.your_email.focus();
		return false;
	}
	if(isEmail(document.friend_form.your_email.value) == false)
	{	
		document.friend_form.your_email.focus();
		return false;
	}
	if (document.friend_form.friend_name.value=='')
	{
		alert("Please enter Friend's name. ");
		document.friend_form.friend_name.focus();
		return false;
	}
	if(IsCharacter(Friend_Name)==false)
	{
		alert("Please enter a valid Friend's name.");
		document.friend_form.friend_name.focus();
		return false;
	}
	if (document.friend_form.friend_email.value=='')
	{
		alert("Please enter friend email id.");
		document.friend_form.friend_email.focus();
		return false;
	}
	if(isEmail(document.friend_form.friend_email.value) == false)
	{	
		document.friend_form.friend_email.focus();
		return false;
	}
	
}