function countWords(src) {
        array = src.split(/\W+/);

        return (array.length-1);
}

function wordsleft(src) {
     count = countWords(src);
     left = 50 - count;
     if (left < 0) {
       left = 0;
     }
     
     if (left == 1) {
       document.getElementById('left').innerHTML = "1 word left...";
     } else {
       document.getElementById('left').innerHTML = left + " words left...";
     }
}