function checkOrientation(){
      var currMode = "";
      switch(window.orientation){
           case 0:
           currMode = "portrait";
           break;
           case -90:
           currMode = "landscape";
           break;
           case 90:
           currMode = "landscape";
           break;
           case 180:
           currMode = "landscape";
           break;
     }
     return currMode;
}