function AlertMessage(Value)
        {
            try
            {
                if(Value == parseInt(-5))
                {
                    alert('Error Connecting to Database!');
                }
                else if(Value == parseInt(-1))
                {
                    alert('User is not active!');
                }
                else if(Value == parseInt(0))
                {
                    alert('Invalid Username or Password!');
                }
            }
            catch(err)
            {
            
            }            
        }
        
        function valid_input(e){
        var key_code = e.keyCode? e.keyCode : e.charCode
        if(key_code == 39 || key_code == 34 || key_code == 92 || key_code == 47 ||
         key_code == 126 || key_code == 63 || key_code == 94 || key_code == 37 || key_code == 32)
         {
            return false;
         }
    }
    
    function replace_invalid_char(txt_obj)
    {
        txt_obj.value = txt_obj.value.replace("'", "").replace("/", "").replace("\"", "").replace("~", "").replace("?", "").replace("~", "").replace("^", "").replace("%", "");
    }