Here's the code that created the answer:

<A HREF="https://www.htmlgoodies.com" onMouseOver="alert('Click OK to make this go away')"; return true>Click Here</A>

     Notice the format remains basically the same. The assignment was to make an onMouseOver produce an alert, so we knew we had to keep the onMouseOver command. If the onMouseOver command was to make the alert occur then that must be what the onMouseOver equalled. Plug in the alert format, keep the double quotes, change out the text that will appear on the alert box, and you have it.