Javascript Question....

I have a javascript question that's for a site that I'm working on:

I have a javascript function written for opening a page in a separate window. Some of this script is the following:

function daWindow(){
newWindow=window.open("blahblahblah.htm","newWindow","width=698,height=620");
}

The problem is that I would like the new window to open and always be centered on the screen. I know about the "moveTo()" function in javascript, but I'm not sure if this would be a way to do it. Any suggestions? I'd really appreciate it