Its clear that the content in the iframes are not readable to spider. But how can i make that content readable to spiders? any method?
Hmm - is it possible for you to include your content by include(); ? That makes your content visible to spieders and bots
Don't use iframes if its not really the need. If you must, use the "longdesc" attribute of the <iframe> tag to place a description of the information you want indexed. Browsers that don't support iframes should be able to read and index the information contained within that attribute.