Prevent this page from creating additional dialogs in Chrome

Question

While i was working on a project i used default alert message provided by javascript. But in chrome , a default check box is showing like "Prevent this page from creating additional dialogs" and when i click on that checkbox then no more alert box is showing. I searched a lot in google and what i found is that a particular session is using for that check box and until the session is active we can't enable alert anymore. One Solution i found is that i need to close that tab or duplicate that tab and then it's working fine. But i don't need that solution. Is anyone can help me out. Any help would be appreciated.Thanks in Advance.