Ext.onReady(function() {
    var rows = 4;
    for(i=1;i<rows+1;i++) {
        var container = Ext.query('#bannerImage' + i);
        var cluster = Ext.query('.csc-textpic-imagerow', 'bannerImage' + i);    
        var randomNbr = Math.floor(Math.random()*cluster.length + 1);
        var count = 1;
        Ext.each(cluster, function(item, index) { 
            //item.id = 'csc-textpic-image_'  + i + '_' + count;
            if(count != randomNbr) {
                item.style.display = 'none';
            }
            else {
                item.style.display = 'block';                
            }
            count++;
        });
        //var container = Ext.get('bannerImage' + i);
        //alert(container.id);
        Ext.each(container, function(item, index) { 
            item.style.display = 'block';
        });
    }
});