:
var divArray = new Array();
$('.CCC').each( function() { divArray.push(this); });
for(i=0, x=divArray.length, i<x, i++){
$(divArray[i]).animate('height', '100px').html("I'm div the "+i+'th div');
}
, jQuery , :
for(i=0, x=$('.CCC').length, i<x, i++){
$('.CCC')[i].animate('height', '100px').html("I'm div the "+i+'th div');
}