$(document).ready(function(){

var sliderCount = 0;

if(!navigator.userAgent.match(/Android/i) &&
   !navigator.userAgent.match(/webOS/i)   &&
   !navigator.userAgent.match(/iPhone/i)  &&
   !navigator.userAgent.match(/iPod/i)
  )
  
    $('#hp_slider').nivoSlider({
        effect:       'fade',//'sliceDown,sliceDownLeft,sliceUp,sliceUpLeft,sliceUpDown,sliceUpDownLeft',
/*
fold
fade
random
slideInRight
slideInLeft
boxRandom
boxRain
boxRainReverse
boxRainGrow
boxRainGrowReverse
*/
        startSlide:   2,
        animSpeed:    1000,
        pauseTime:    5*1000,
        directionNav: false,
        controlNav:   false,
        afterChange: function(){
            if(sliderCount >= 2) $('#hp_slider').data('nivoslider').stop();
            sliderCount++;
            }
    });
});