Why doesn VischeckURL work on my site?
To simulate an entire webpage, VischeckURL must parse the html code of that web page. Parsing html and all the ‘extras’ that have been tacked onto it (CSS, Javascript, Flash, ActiveX, etc.) is no trivial task. We have concentrated on making VischeckURL robust when parsing plain HTML and have added some functionality for working with CSS and Javascript. When we have more time and resources we will add extra feature (see below).