http://www.rgbstock.com/css/rgbstock/images/bg/join.png
where can I find this kind of images as shown in home page of rgbstock.com
The image you pointed to is one of the many Crystal Clear Icons. An open source icon set from everaldo.com.
http://www.everaldo.com/crystal/?action=preview
Great icon set Jay! They have some I have been looking for. thanks