suggest me and help how to display images based according to choose dropdownlist

hi frds, i have a doubt can any one suggest me plz, actually me need is i want to display some 200 products with image , i have a dropdownlist, in that dropdown i have only images, images with description, only discription, when i choose only images , i have to display only images, when i choose images with description, i have to display images with description, when i choose only description i have to display only this description....
so this is my actual project description, so any one can guide me and suggest me what to do and how to do,

thanks
regards
ramarajan