Asp.Net MVC 4, when select list is open, click evet not working (firefox)?

Firefox, when i click select list and click other else not woking
but chrome is working
anyone help me fix it (firefox)

http://jsfiddle.net/Gt7Yq/1/
example: i click select list (select is open) and i click <a>ABC</a> alert("A") not working (firefox), but chrome is working

thank so much and sorry my E so bad!