// JavaScript Document
	function check()
	{
		if(document.frm.fname.value == "")
		{
			alert("Please enter your freind's name");
			document.frm.fname.focus();
			return false;
		}	
		if(document.frm.femail.value == "")
		{
			alert("Please enter friend E-mail.");
			document.frm.femail.focus();
			return false;
		}
		else
		{
			if(!emailInvalid(document.frm.femail.value))
			{
				alert("Please enter valid emailid");
				document.frm.femail.focus();
				return false;
			}
		}	
		if(document.frm.tname.value == "")
		{
			alert("Please enter your name");
			document.frm.tname.focus();
			return false;
		}		
		if(document.frm.yemail.value == "")
		{
			alert("Please enter your E-mail.");
			document.frm.yemail.focus();
			return false;
		}
		else
		{
			if(!emailInvalid(document.frm.yemail.value))
			{
				alert("Please enter valid emailid");
				document.frm.yemail.focus();
				return false;
			}
		}		
			if(document.frm.comment.value == "")
		    {
			alert("Please enter your Comment.");
			document.frm.comment.focus();
			return false;
		    }
		return true;
	}	
	function emailInvalid(s)
	{
		if(!(s.match(/^[\w]+([_|\.-][\w]{1,})*@[\w]{2,}([_|\.-][\w]{1,})*\.([a-z]{2,4})$/i) ))
		{
			return false;
		}
		else
		{
			return true;
		}
	}