function mapWindow(url, windowName, windowHeight, windowWidth){

  var winwidth      = windowWidth;
  var winheight     = windowHeight;
  var desktopHeight = screen.availHeight;
  var desktopWidth  = screen.availWidth; 
  var top   = (desktopHeight - winheight) / 2;
  var left  = (desktopWidth - winwidth) / 2;
  var urlPrefix = "";
  var winurl    = url;
  var winname   = windowName;
  var winopt    = "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,copyhistory=0,resizable=1,width="+winwidth+",height="+winheight+",left="+left+",top="+top;
  var newwin    = window.open(winurl,winname,winopt);

}

// BEGIN RANDOM ROTATING IMAGE FOR TOP HEADER 
	
	var currentdate = 0;
	var core = 0;

	function initArray() {
	
	this.length = initArray.arguments.length;
	  for (var i = 0; i < this.length; i++) {
	  this[i] = initArray.arguments[i];
	  }
	}
	
	image = new initArray(
	"/images/topbanners/banner1.jpg",
	"/images/topbanners/banner2.jpg",
	"/images/topbanners/banner3.jpg",
	"/images/topbanners/banner4.jpg",
	"/images/topbanners/banner5.jpg"
	);
			
	text = new initArray(
	"Marriott Vacation Club",
	"Marriott Vacation Club",
	"Marriott Vacation Club",
	"Marriott Vacation Club",
	"Marriott Vacation Club"
	);
		
	var currentdate = new Date();
	var core = currentdate.getSeconds() % image.length;
	var ranimage = image[core];
	var rantext  = text[core];

// END RANDOM HEADER