var str = "your long string with many words.";
var wordCount = str.match(/(w+)/g).length;
alert(wordCount); //6
// w+ between one and unlimited word characters
// /g greedy - don't stop after the first match<html>
<body>
<script>
function countWords(str) {
str = str.replace(/(^s*)|(s*$)/gi,"");
str = str.replace(/[ ]{2,}/gi," ");
str = str.replace(/
/,"
");
return str.split(' ').length;
}
document.write(countWords(" Tutorix is one of the best E-learning platforms"));
</script>
</body>
</html>