ok.js

U.onResize = function() {
  U.handleNexusOrientation();
  U.handleiOS6PositionTablet();
  U.handleBB10FixedPosition();
  if (U.isOAAMLoginWifiPage(U.getCurrentPage())) {
    var x = 0;
    if (U.isTablet()) {
      x = 42
    } else {
      x = 28
    }
    $("#login-wrapper").height($(window).height() - x)
  }
  if (RTModernizr.ios7ThinClient()) {
    var baseString = "width=device-width, maximum-scale=1.0, minimum-scale=1.0, initial-scale=1.0, user-scalable=no";
    $("#metaviewport").attr("content", "");
    $("#metaviewport").attr("content", baseString + ", height=" + $(window).height() + "px")
  }
  U.handleiOS6Popup();
  if (U.getOrientation() == 1) {
    if (U.getCurrentPage() == "home" || U.getCurrentPage() == null) {
      if (U.isTablet()) {
        U.setLayout(4)
      } else {
        if (!!Modernizr.blackberry) {
          U.setLayout(1);
          $("#pillarContainer").css("display", "table");
          $("#contentArea").css("margin-top", "55px")
        } else {
          if (!!Modernizr.BB10 && ($(window).width() == 346 || clientParams.device_name == "classic")) {
            U.setLayout(1);
            $("#pillarContainer").css("display", "table");
            $("#contentArea").css("margin-top", "85px")
          } else {
            U.setLayout(3)
          }
        }
      }
    } else {
      if (U.isTablet()) {
        U.setLayout(5)
      } else {
        if (!!Modernizr.blackberry) {
          U.setLayout(2);
          $("#contentArea").css("padding-top", "0px")
        } else {
          U.setLayout(2)
        }
      }
    }
  } else {
    if (!!Modernizr.MSIE10) {
      $("#pillarArea").css("position", "static");
      $("#pillarArea").css("top", "auto")
    }
    if (U.getCurrentPage() == "home" || U.getCurrentPage() == null) {
      U.setLayout(1)
    } else {
      U.setLayout(2)
    }
  }
  if ($("#exitSplash")) {
    $("#exitSplash > div").height($(window).height())
  }
}

The way the data flows is easy to reason about.

if (U.canHandleNexusOrientation()) {
  U.isOnATablet();
  soDo();
}