function check_refer(f)
	{
			
		
		if(f.name.value=="")
			{
				alert("Please Fill your name");
				f.name.focus();
				return false;				
			}

		if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(f.email.value)))
			{
			alert("Enter Valid Email addresss");
			f.email.select();
			return false;
			}
	
		if(f.fname.value=="")
			{
				alert("Please Fill Atleast three of your Friend's Name");
				f.fname.focus();
				return false;				
			}

		if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(f.femail.value)))
			{
			alert("Please Fill Atleast three of your Friend's Valid Email addresss");
			f.femail.select();
			return false;
			}
	
	
		if(f.fname2.value=="")
			{
				alert("Please Fill Atleast three of your Friend's Name");
				f.fname2.focus();
				return false;				
			}
		
		if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(f.femail2.value)))
			{
			alert("Please Fill Atleast three of your Friend's Valid Email addresss");
			f.femail2.select();
			return false;
			}
		
		if(f.fname3.value=="")
			{
				alert("Please Fill Atleast three of your Friend's Name");
				f.fname3.focus();
				return false;				
			}
		
		if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(f.femail3.value)))
			{
			alert("Please Fill Atleast three of your Friend's Valid Email addresss");
			f.femail3.select();
			return false;
			}
			
	if(f.message.value=="")
			{
				alert("Please Enter the Message");
				f.message.focus();
				return false;				
			}
			
		alert("Email is sending to your friend.");
		
		window.location.href="http://www.vebsite.com/ebook2.php";
				
	}