<script language=javascript>
str="jaldjgkjlkj'jajfdlldkfjadfljladjf"
re=/ld/g;
var array=str.match(re);
alert(array.length);
</script>
str="jaldjgkjlkj'jajfdlldkfjadfljladjf"
re=/ld/g;
var array=str.match(re);
alert(array.length);
</script>
var a = s.match(/ld/g);
if(a)
alert(a.length);