$(document).ready(function() {
    $(".portfolio_control").click(function() {
        // Grab some details
        var slider = $("#portfolio_slider");
        var slidermargin = parseInt(slider.css('marginLeft').replace("px", ""));
        var width = 992;
        var sliderneg = parseInt(slider.width()-(slider.width()*2));

        // Toggle which direction we're moving
        if ($(this).attr('id') == "portfolio_right")
            var newmargin = (slidermargin-width <= sliderneg) ? sliderwidth : slidermargin-width;
        else
            var newmargin = (slidermargin+width > 0) ? 0 : slidermargin+width;

        // Do the shweet animation
        $('#portfolio_slider').animate({
            marginLeft: newmargin
          }, 500, 'swing', function() {
            
          });
          
        return false;
    });
});