Just add a _blank target to the link:

Code:
		if (thisLink.text.substring(thisLink.text.length-1).toLowerCase() == 's') {
		    newLink.innerHTML = '<a href="'+galleryLink+'" TARGET=_BLANK>'+thisLink.text+'\' Maps</a>'
		} else {
		    newLink.innerHTML = '<a href="'+galleryLink+'" TARGET=_BLANK>'+thisLink.text+'\'s Maps</a>'
		}
-Rob A>