I am studying M.S(Software engineering)..I am badly in need of microscopic images.I need images for the following abnormalities Down syndrome,turner syndrome,klinefilter syndrome,triple-X syndrome,edward syndrome, Jacob syndrome.I need unpaired and paired chromosomal images with 400 band resolution..pls mail me or provide me the link.

The proper term for what you are looking for is "metaphase spreads", and it falls under the more generic term of "karyotyping" and "cytogenetics". I do not know of any database that has those kinds of images stored, so you'll probably have to search Pubmed or Google Scholar for papers which have published high-resolution images.

For example, a google scholar search for the following term (as written, with quotations):
finds 36 papers on the topic, and a spot check of 2 of those papers showed that both had 400-band resolution metaphase spreads as part of the article. If the images in the article are of too low resolution, you may be able to convince the paper's authors to e-mail you high-res images.

Another place you may want to check is the forums over at Molecular Station - a lot of geneticists hang out there, and may be able to provide you with better info, perhaps even a database.

Bryan