I'm a bit confused by the results of the html validator at validator.w3.org/check
(I am using the <!DOCTYPE html>
(html 5) option, and the site says that there may be mistakes in the new HTML 5 validator. I'm not sure whether I am looking at a mistake or not.)
It complains about this line:
<a href="itempurchasesell?id=2&purchase=true&loc=Main%20Warehouse">
It says: & did not start a character reference. (& probably should have been escaped as & amp;.)
Can I ignore this error, or is something wrong with my code? Please pardon my ignorance.