I am developing a directory site and would love to find a script similar to a spider that would scan websites / pages for malicious scripting such as activeX controls, browsers hijackers, virus loaders, and others.

Like a spidering script, this would be used to update my database of URL's. The idea is to inform my users of possible threats before they stumble onto them without adequate protection or just so they would know better thatn to visit those sites.

Any help would be great!