function jsOpenCenteredWindow(strUrl, strName, arrAttr) {
	attr = new Object;
	attr.width = 470; attr.height = 400;
	attr.titlebar = 0; attr.toolbar = 0;
	attr.status = 0; attr.menubar = 0;
	attr.location = 0;
	attr.scrollbars = 1;
	attr.top = (screen.height / 2) - (attr.height / 2);
	attr.left = (screen.width / 2) - (attr.width / 2);
	attr = jsArrayMerge(attr, arrAttr); 
	
	window.open(strUrl, strName, jsImplode(',', attr));
}