JS and a new URL

I have tried to use this function when I wish to redirect to an URL in a new window. It opens a new window, but somehow an error occurs and the content is not displayed.

Code:

---

function juels()
{
        document.forside.target = "blank.htm";
        document.forside.action = "http://www.vbforums.com";
        document.forside.submit();
}

---

the code for a new window is much simpler!

window.open("http://www.vbforums.com");