Menu nav… view symbol if it has a specific url

I need to activate a navigation menu (about us, our products, contacts us, etc.) create with Edge Animate in a website (more web pages with the same menu), but I’ve difficult with "current marking" function (rollover active state).

This is the behavior requested:

1) create a variable, “myVariable1”;

2) if “myVariable1” has the exact url (example, “/en/company.php”) in the browser, view “sym.getSymbol("button_a").play("Up”);”

How to create this javascript code in Edge Animate?

Thanks