function uplate_word_score(word){
    if (word){       
                var i = word.length;
                var score = 0;
                while (i--) {
                  score += letter_values[word.charAt(i)];
                }
                
                $("#word_score_val").html("Gain : "+score+" points" );
                

        }else{
                $("#word_score_val").html("");
                
                }
                
        

}