Hello friends, are you know do SEO spiders read content within grayboxes? If you have any idea please suggest me.
If your trying to hide text within greyboxes on your site to keyword stuff etc, that is called cloaking. Cloaking is against the rules of all major search engines and could lead to your page being de-indexed. If you want to know how your site appears to Search engine spiders just use one of the many search as a search engine tools out there.
Well spiders actually don't see the website like you do, they just check the source code so anything you have there they will see.
about SEO spiders , there is difference on different search enginner , so you can download data from web to skim it carefully .
Any 'black hat' SEO technique is a bad idea. Google are constantly releasing new updates to combat 'spammy' methods, be it keyword spam/stuffing or backlinks which appear spammy. Just stick to the basic guidelines of SEO - Which can be found all over the net and you will have success. SEO is a long game and there are no quick fixes.....Unfortunately