how to get details of a user computer?
<p>I have an image gallery.There is a <strong>report abuse</strong> option for each image.If an image was reported from a logged user,A new record will be added to report_table with user_id,image_id,report_reason and user's IP.</p>

<p>After monitoring few days, I found that some people are logging with different accounts in my website and reporting my images even there is no point of reporting an image.</p>

<p>What i need to do is to identify if the report request is coming from the same computer.As we know most of the internet users works with dynamic IPs.So IP's are not a that much unique data to identify them.</p>

<p>Is there any way i can get more details from a users computer or how can i overcome this problem? Thanks</p>
