function validate_required(field,alerttxt)
	{
		with (field)
		{
			if (value==null||value=="")
		  	{alert(alerttxt);return false;}
		else {return true}
		}
	}
	function validate_form(thisform)
		{
		with (thisform)
		{
			if (validate_required(fullname,"Full name is required")==false)
		  		{fullname.focus();return false;}
			if (validate_required(email,"Email is required")==false)
		  		{email.focus();return false;}
			if (validate_required(message,"Message is required")==false)
		  		{message.focus();return false;}
		}
	}