function decideWindow(url)
{
if (opener && !opener.closed){
	replace(url); }
    else 
        { nwWindow(url); }
}

function nwWindow(url)
{
myWin=open(url, 'myWin', '');
myWin.focus();
}

function replace(url)
{
myWin.location.href=url;
}