function valid_refer_to_friend()
{
	var frm=document.refere_to_friend;
	
	if(frm.friend_email.value=="")
	{
		alert("Email should not be empty.");
		frm.friend_email.focus();
		return false;
	}
	else if(checkMail(frm.friend_email.value)==false)
	{
		alert("Invalid email address!")
		frm.friend_email.focus();
		return false;
	}
	else if(frm.your_email.value=="")
	{
		alert("Email should not be empty.")
		frm.your_email.focus();
		return false;
	}	
	else if(checkMail(frm.your_email.value)==false)
	{
		alert("Invalid email address!")
		frm.your_email.focus();
		return false;
	}
/*	else if(frm.message.value=="")
	{
		alert("Last Name should not be empty.");
		frm.lname.focus();
		return false;
	}
	*/
	else
	{
		return true;	
	}
}

function checkMail(email)
{
	var x = email;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)) 
	{
		return true;		
	}
	else 
	{
		return false;
	}
}