Link to another browser tab

Hi, I have this code to go to a web address, but opens in the same browser window.

Start function () { / / Start a download of The Given URL var www: WWW = new WWW (url);

/ / Wait for download to complete www yield;

/ / Assign texture renderer.material.mainTexture = www.texture;

}

OnMouseDown function () { Application.OpenURL ("http://google.com"); }

How do I link another browser screen?

Thanks