If a homepage of the website is using some mouse over actions like article display or product display when the mouse is placesd on the given image or text, how it will be treated by crawlers?
It depends if the text that is displayed on the mouseover action is contained within the page source code or if it is generated via some javascript or ajax. If it is contained within the source code of the page then the crawlers will most likely find it, but if it is contained within javascript code, or an external javascript file or displayed via ajax then the chances of the crawlers finding it are not very good.