Here's the code to popup double alert box when someone open your profile page.

Place the code in Media section.

<img src="" id="mycode"
style="height:expr/**/ession(alert('ALERT MESSAGE 1'))
(alert('ALERT MESSAGE 2'));;
width:expr/**/ession(document.all.mycode.style.height='0px')"  />

Also consider that some people might feel disturbed with your alert boxes, LOL. And this code only works on Internet Explorer.

Note: To make it works properly, Don't combine the code with any other alert or confirm box code.